下唇|したくちびるshitakuchibiru

1. nounlower lip

• Antonym上唇うわくちびるNeutralAntonym of 下唇, denoting the upper lip. Neutral in register, it pairs directly with 下唇 and differs only in which lip is referred to.

Choose 下唇 for the lower lip and 上唇 for the upper lip; the two are direct antonyms, and 上唇 is neutral in register, so the choice depends purely on which lip is meant.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 唇くちびるのうち下方かほうのもの。うわくちびる。
2. （かしん）節足動物せっそくどうぶつの口器こうきの一部いちぶ。