under-employment (n.) under-employed (adj.) under-achiever (n.) under (prep., adv.) under prep. 在……下麪；在……表麪下；在……的後麪；（職務、級別）低於；少於；比……年輕；由……控制；根據；在……過程中；受……影響；承受著；以（某一名字）；在……項下；在（某個系統）下；在……期間；在……生存條件下；栽有；在……掌權期間；在……手下工作 adv. 在下麪；在水下；少於；較年輕；在昏迷中； adj. 較低的；下麪的undeniable (adj.) undemonstrative (adj.) undemanding (adj.) undelivered (adj.) undefined (adj.) undefinable (adj.) undefiled (adj.) undefended (adj.) undefeated (adj.) undecisive (adj.) undecipherable (adj.) undecided (adj.) undecennial (adj.) undeceived (adj.) undeceive (v.)