underarm
adj. US //ˌəndɝˈɑɹm// UK //ˌʌndəɹˈɑːm// un·der·arm
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 under- + arm. The armpit sense is not old, historically speaking (1920s), and it is believed to have arisen as a euphemism in advertising.
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