underworkˈ transitive verb

1. To undermine
2. To employ too little in work
3. To work for less than the wage of
4. To work secretly against (obsolete; Shakespeare pat underwroughtˈ)

To do less work than is desirable

1. A substructure
2. Underhand, inferior or subordinate work

unˈderworker noun

unˈder-workˈman noun