Skip to the word

Added 10 October 2026

underarm

/ˈʌndɚˌɑɹm/ noun

noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about underarm at Wordnik → Where our words come from →

The armpit.
underarm deodorant
Old-fashioned and now outlawed style of bowling in which the arm is not swung over the shoulder.

adjective

For use under the arm.

verb

To supply with insufficient weaponry.

Origin

From under- + arm. The armpit sense is not old, historically speaking (1920s), and it is believed to have arisen as a euphemism in advertising.

From Wiktionary, via Kaikki.org (CC BY-SA)

Back to today's word