愚図愚図[guzuguzu] slowly
闇愚[angu] imbecility
愚か[oroka] foolish
愚かしい[orokashii] foolish
愚挙[gukyo] foolish undertaking

愚行[gukou] folly
愚妻[gusai] wife
愚人[gujin] fool
愚生[gusei] (primarily used in letters, etc.) I
愚癡[guchi] idle complaint