一介[ikkai] mere
荷厄介[niyakkai] encumbrance
介して[kaishite] through the medium of
介意[kaii] worrying about
介殻[kaikaku] sea shell

介護[kaigo] nursing
介甲[kaikou] crust-like shell
介在[kaizai] mediation
介錯[kaishaku] suicide assistant
介添え[kaizoe] helper

おけさ節[okesabushi] style of Japanese folk song associated with Niigata Prefecture
双節棍[nunchaku] nunchaku (two linked fighting sticks)
一音節[ichionsetsu] monosyllable
一節切り[hitoyogiri] one-jointed bamboo musical instrument
音節[onsetsu] syllable

鰹節[katsubushi] katsuobushi
環節[kansetsu] segment (of worm)
関節[kansetsu] joints (knee joint, elbow joint, etc.)
関節リューマチ[kansetsuryuumachi] rheumatoid arthritis
関節炎[kansetsuen] arthritis

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