also: かしん
noun
lower lip
Refers to the lower lip in anatomy, everyday speech, and expressions.
彼は緊張して下唇を噛んだ。
He bit his lower lip nervously.
下唇が乾燥してひび割れた。
My lower lip got dry and chapped.
Standard kanji spelling; the reading したくちびる is the most common.
Rare Sino-Japanese reading, mainly encountered in medical or formal contexts.
上唇 means 'upper lip', the counterpart to 下唇.
Compound of 下 (lower) and 唇 (lip). The reading したくちびる is a native Japanese reading, while かしん is the Sino-Japanese reading.