From Germanic: untar,undir,undar Sample words for the root under: understood, underachiever, undercover, underweight, underhanded, underwrite, undergarment, underrate, undersized, undergraduate, underground, undermine, underneath, undertake, undertaking, underwater, underestimate, underlying, undergo, underscore, underlie, undercharge. Each word has meanings and examples. Click their buttons to get sentences selected from classic works and modern media.