The savage brute that makes thee cry for dread
     Lets no man pass this road of hers, but still
     Trammels him, till at last she lays him dead.
Vicious her nature is, and framed for ill;
     When crammed she craves more fiercely than before;
     Her raging greed can never gorge its fill.

[Chè questa bestia, per la qual tu gride,
     Non lascia altrui passar per la sua via,
     Ma tanto lo impedisce, che l’ uccide:
E ha natura sì malvagia e ria,
     Che mai non empie la bramosa voglia,
     E dopo il pasto ha più fame che pria.]

Dante Alighieri (1265-1321) Italian poet
The Divine Comedy [Divina Commedia], Book 1 “Inferno,” Canto 1, l. 94ff (1.94-99) [Virgil] (1320) [tr. Sayers (1949)]
    (Source)


The she-wolf (lupa) of incontinence/wantonness, though some associate her with wrath, or with avarice. (Source (Italian)). Alternate translations:

This raging Beast, which here you so much dread
Permits not any to pass on their way,
And never leaves them 'till their death she gains:
Her nature so perversely is dispos'd
That she never satisfies her greedy will;
But with each meal her hunger is increas'd.
[tr. Rogers (1782), l. 84ff]

Monster so fell, Numidia never bore,
As she, who riots there in human gore,
By inextinguishable famine stung.
The Fiend her hunger tries to sate in vain.
Still grows her appetite with growing pain.
And ceaseless rapine feeds the rising blaze.
[tr. Boyd (1802), st. 17-18]

          This beast,
At whom thou criest, her way will suffer none
To pass, and no less hindrance makes than death:
So bad and so accursed in her kind,
That never sated is her ravenous will,
Still after food more craving than before.
[tr. Cary (1814)]

For the fell beast who late, thy steps waylaying,
     Caused thee to shriek, lets none a passage find
     Across her walk, but hindereth e'en to slaying.
Baleful she is, and of so curst a kind.
     Her ravenous maw no glut can satisfy.
     But eats and leaves a hungrier greed behind.
[tr. Dayman (1843)]

Because this beast, for which thou criest, lets not men pass her way; but so entangles that she slays them;
and has a nature so perverse and vicious, that she never satiates her craving appetite; and after feeding, she is hungrier than before.
[tr. Carlyle (1849)]

The beast for which you utter such a cry
Suffers none else to pass her way, and will
Obstruct so far their passage as to kill:
Of nature so malignant to the core,
Insatiate hungers, ever longs for more;
And after eating hungrier than before.
[tr. Bannerman (1850)]

For lo! this creature, cause of thy great cry,
     Lets none pass her, but so bars the way,
     And with such deadly malice, that she slays.
So evil is her nature and so foul,
     Her lustful appetite is never quench'd
     And after eating she still craves the more.
[tr. Johnston (1867)]

Because this beast, at which thou criest out,
     Suffers not any one to pass her way,
     But so doth harass him, that she destroys him;
And has a nature so malign and ruthless,
     That never doth she glut her greedy will,
     And after food is hungrier than before.
[tr. Longfellow (1867)]

Because this beast, for the which thou criest out, lets not any pass by her way, but hinders him in such wise that she slays him. And she has a nature so evil and guilty that she never fulfils her greedy will, and after her repast has more hunger than before.
[tr. Butler (1885)]

That beast, at which thou criest, by this way
     Permits not one to pass, for evermore,
     But bars the passage so, that she will slay.
Of wickedness her nature has such store
     That her keen craving ne'er is satisfied,
     But after food she's hungrier than before.
[tr. Minchin (1885)]

For this beast, because of which thou criest out, lets not any one pass along her way, but so hinders him that she kills him! and she has a nature so malign and evil that she never sates her greedy will, and after food is hungrier than before.
[tr. Norton (1892)]

Because this beast, by reason of which thou criest aloud, suffereth none to come her way, but hindereth so rudely, that she slayeth them. So baneful and accursed is her nature, that she can never glut her ravening greed ; and after feeding she is hungrier than before.
[tr. Sullivan (1893)]

For this same beast, for cause whereof thou criest.
     To pass along her way allows no stranger,
     But hindereth him so far that she doth slay him.
Nature hath she so wicked and malicious
     That never doth she sate her ravenous craving,
     And after food is hungrier than before it.
[tr. Griffith (1908)]

For this beast on account of which thou criest lets no man pass her way, but hinders them till she takes their life, and she has a nature so vicious and malignant that her greedy appetite is never satisfied and after good she is hungrier than before.
[tr. Sinclair (1939)]

Because this beast, at which thou criest still,
     Suffereth none to go upon her path,
     But hindereth and entangleth till she kill,
And hath a nature so perverse in wrath,
     Her craving maw never is satiated
     But after food the fiercer hunger hath.
[tr. Binyon (1943)]

     For that mad beast that fleers
before you there, suffers no man to pass.
     She tracks down all, kills all, and knows no glut,
     but, feeding, she grows hungrier than she was.
[tr. Ciardi (1954), l. 90ff]

For this beast, the cause of your complaint, lets no man pass her way, but so besets him that she slays him; and she has a nature so vicious and malign that she never sates her greedy appetite and after feeding is hungrier than before.
[tr. Singleton (1970)]

This beast, the one you cry about in fear,
     allows no soul to succeed along her path,
     she blocks his way and puts an end to him.
She is by nature so perverse and vicious,
     her craving belly is never satisfied,
     still hungering for food the more she eats.
[tr. Musa (1971)]

     The beast that is the cause of your outcry
allows no man to pass along her track,
but blocks him even to the point of death;
     her nature is so squalid, so malicious
that she can never sate her greedy will;
when she has fed, she's hungrier than ever.
[tr. Mandelbaum (1980)]

For that beast, which has made you so call out,
Does not allow others to pass her way,
But holds them up, and in the end destroys them;
And is by nature so wayward and perverted
That she never satisfies her wilful desires,
But, after a meal, is hungrier than before.
[tr. Sisson (1981)]

          This beast,
The cause of your complaint, lets no one pass
Her way -- but harries all to death. Her nature
Is so malign and vicious she cannot appease
Her voracity, for feeding makes her hungrier.
[tr. Pinsky (1994), l. 72ff]

For this beast at which you cry out lets no one pass by her way, but so much impedes him that she kills him;
and she has a nature so evil and cruel that her greedy desire is never satisfied, and after feeding she is hungrier than before.
[tr. Durling (1996)]

This creature, that distresses you, allows no man to cross her path, but obstructs him, to destroy him, and she has so vicious and perverse a nature, that she never sates her greedy appetite, and after food is hungrier than before.
[tr. Kline (2002)]

     That beast -- you cry out at the very sight --
lets no one through who passes on her way.
She blocks their progress; and there they all die.
     She is by her nature cruel, so vicious
she can never sate her voracious will,
but, feasting well, is hungrier than before.
[tr. Kirkpatrick (2006)]

For the beast that moves you to cry out
lets no man pass her way,
but so besets him that she slays him.
Her nature is so vicious and malign
her greedy appetite is never sated --
after she feeds she is hungrier than ever.
[tr. Hollander/Hollander (2007)]

Because this beast you complain of never lets
Anyone pass her along this road, harassing
And hindering them until she sees them dead,
Her nature being so malign and savage
That she is never able to finish her feasting,
Hungrier after she eats than before.
[tr. Raffel (2010)]

You're bound to lose:
Bound by the spell of this beast pledged to keep
you crying, you or anyone else who tries
To get by. In a bad mood it can kill,
And it's never in a good mood. See those eyes?
So great a hunger nothing can fulfil.
It eats, it wants more, like the many men
Infected by its bite.
[tr. James (2013)]