悪習慣[akushuukan] bad habit
慣らす[narasu] to accustom
慣れ[nare] practice
慣れる[nareru] to grow accustomed (to)
慣行[kankou] customary practice

慣行取引き[kankoutorihiki] usual business practices (practises)
慣習[kanshuu] usual (historical) custom
慣性[kansei] inertia
慣用[kanyou] common
慣用句[kanyouku] idiomatic usage

土耳古[toruko] Turkey
白耳義[berugii] Belgium
外耳[gaiji] external ear
牛耳る[gyuujiru] to control
口耳[kouji] mouth and ear

口耳の学[koujinogaku] shallow learning
耳がとおい[mimigatooi] poor hearing
耳をすます[mimiwosumasu] to listen carefully
耳を貸す[mimiwokasu] to lend an ear to