Webster's Revised Unabridged Dictionary · 1913

Fatten

Fatten , transitive verb

[See Fat, transitive verb]

1.
To make fat; to feed for slaughter; to make fleshy or plump with fat; to fill full; to fat.
2.
To make fertile and fruitful; to enrich; as, to fatten land; to fatten fields with blood. — Dryden

Fatten , intransitive verb

To grow fat or corpulent; to grow plump, thick, or fleshy; to be pampered.
And villains fatten with the brave man's labor. — Otway