underestimate估计不足(under+estimate估计)
underplay对…轻描淡写(under+play玩→没玩够→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→发展不够)
undersized不够大的(under+sized大的→不够大的)
underagent副代理人(under+agent代理人)
underofficer下级官员(under+officer官员)