290. unbend 放松 unbent unbent
291. unbind 解開 unbound unbound
292. unbuild 拆除 unbuilt unbuilt
293. underbid 出低價 underbid underbidden, underbid
294. underbuy 賤價買走 underbought underbought
295. undercut 廉價出售 undercut undercut
296. underdo 不盡力 underdid underdone
297. underfeed 喂不飽 underfed underfed
298. undergo 遭受 underwent undergone
299. underlay 鋪墊 underlaid underlaid
300. underlet 低價出租 underlet underlet
301. underlie 位居其次 underlay underlain
302. underpay 克扣 underpaid underpaid
303. underrun 跑不過 underran underrun
304. undersell 拋售 undersold undersold
