お風呂に入る[ofuronihairu] to take a bath
鍬入れ式[kuwaireshiki] ground-breaking ceremony
塵入[gomiire] trashcan
キー入力[kiinyuuryoku] key (input)
ビジネススクール入学共通試験[bijinesusukuurunyuugakukyoutsuushiken] business school entrance test

メスを入れる[mesuwoireru] to operate
圧入[atsunyuu] indentation
移入[inyuu] importation
一寝入り[hitoneiri] nap
一入[hitoshio] still more

元寇[genkou] the Mongol Invasion
倭寇[wakou] Japanese pirates (of the Middle Ages)
入寇[nyuukou] invasion

司寇[shikou] Minister of Justice (Zhou-dynasty China)
寇する[atasuru] to harm
寇する[kousuru] to invade