狭い[semai] narrow
狭まる[sebamaru] to narrow
狭める[sebameru] to narrow
狭軌[kyouki] narrow gauge
狭軌鉄道[kyoukitetsudou] narrow-gauge railway

狭義[kyougi] narrow sense (e.g. of a word)
狭苦しい[semakurushii] cramped
狭心症[kyoushinshou] heart attack
狭量[kyouryou] narrow-mindedness
肩身が狭い[katamigasemai] feeling ashamed

緩衝[kanshou] buffered
緩衝器[kanshouki] shock absorber
緩衝地帯[kanshouchitai] buffer zone
刺衝[shishou] stabbing
衝撃[shougeki] shock

衝撃波[shougekiha] shock wave
衝動[shoudou] impulse
衝動行為[shoudoukoui] shock action
衝動買い[shoudougai] impulsive buying
衝突[shoutotsu] collision