1. underwork - Noun
2. underwork - Verb
To injure by working secretly; to destroy or overthrow by clandestine measure; to undermine.
To expend too little work upon; as, to underwork a painting.
To do like work at a less price than; as, one mason may underwork another.
To work or operate in secret or clandestinely.
To do less work than is proper or suitable.
To do work for a less price than current rates.
Inferior or subordinate work; petty business.
Source: Webster's dictionary