undergird

vt.从底层加固,加强; 支持

underbid, underbrush, undercarriage, undercharge, underclothes, undercoat, undercover, undercurrent, undercut, underdeveloped, underdog, underdone, underestimate, underexpose, underexposure, underfed, underfelt, underfloor, underfoot, undergarment, undergo, undergraduate, underground, undergrowth, underhand, underhanded, underlay, underlie, underline, underling, underlying, undermanned, undermentioned, undermine, undermined, underneath, undernourished, undernourishment, underpants, underpass,