Webster's Revised Unabridged Dictionary · 1913

Underwork

Underwork , transitive verb

1.
To injure by working secretly; to destroy or overthrow by clandestine measure; to undermine.
But thou from loving England art so far, That thou hast underwrought his lawful king. — Shakespeare
2.
To expend too little work upon; as, to underwork a painting. — Dryden
3.
To do like work at a less price than; as, one mason may underwork another.

Underwork , intransitive verb

1.
To work or operate in secret or clandestinely. — B. Jonson
2.
To do less work than is proper or suitable.
3.
To do work for a less price than current rates.

Underwork , noun

Inferior or subordinate work; petty business. — Addison