嚥下[enge] (act of) swallowing
息を嚥む[ikiwonomu] to catch one's breath

誤嚥[goen] breathing in (of a foreign body, food, etc.)
嚥下障害[engeshougai] dysphagia

どら息子[doramusuko] lazy son
愛息[aisoku] (your) beloved son
安息[ansoku] rest
一人息子[hitorimusuko] an only son
一息[hitoiki] one breath

因循姑息[injunkosoku] dilly-dallying and temporizing (temporising)
気息[kisoku] breathing
気息奄奄[kisokuenen] gasping for breath
休息[kyuusoku] rest
休息時間[kyuusokujikan] recess