underseal

v [Tn] coat the under-side of (a motor vehicle, etc) with a protective seal 用防蚀涂层涂（机动车等）的底部.

underlie, underline, underling, underlying, undermanned, undermentioned, undermine, undermined, underneath, undernourished, undernourishment, underpants, underpass, underpay, underpin, underplay, underprivileged, underrate, underscore, undersea, undersell, undershirt, undershorts, underside, undersigned, undersized, underslung, undersold, understaffed, understand, understandable, understandably, understanding, understate, understated, understatement, understood, understudy, undertake, undertaker,