underscore

vt. 划线于...下 n. 底线

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