大学英语：under-

① 表示“在…下”

underground地下的(under+ground地)

underwrite在…下面写(under+write写)

underline划线于…下(under+line线，在字底下划线，引申为强调)

undersea在海底(under+sea海)

undermine破坏，损坏(under+mine挖&rarr挖墙角)

underling下属(under+ling小人物&rarr下属)

underclothing内衣裤(under+clothing衣服)

underwear内衣(under+wear穿衣服)

② 表示“不足，不够”

underestimate估计不足(under+estimate估计)

underplay对…轻描淡写(under+play玩&rarr没玩够&rarr说得不够的)

underpopulated人口稀少的(under+populated有人住的)

underdeveloped不发达的(under+developed发展&rarr发展不够)

undersized不够大的(under+sized大的&rarr不够大的)

③ 表示“副手”

underagent副代理人(under+agent代理人)

underofficer下级官员(under+officer官员)