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.