\Un`der*work"\, v. t. [imp. & p. p. {Underworked}or {Underwrought}; p. pr. & vb. n. {Underworking}.] 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. --Shak. 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.
\Un`der*work"\, v. i. 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.
\Un"der*work`\, n. Inferior or subordinate work; petty business. --Addison.