underarm

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

• (US) IPA^(key): /ˈʌndɚˌɑɹm/

• Audio (General Australian):

  (file)

underarm (plural underarms)

1. (often attributive) The armpit.

   underarm deodorant

2. (cricket) Old-fashioned and now outlawed style of bowling in which the arm is not swung over the shoulder.

• (cricket) overarm, sidearm

underarm (not comparable)

1. For use under the arm.
   • 2001, Victoria Sherrow, For appearance' sake:

     A 1997 study found that about 104 million American women were using underarm deodorant products.

underarm (third-person singular simple present underarms, present participle underarming, simple past and past participle underarmed)

1. (transitive) To supply with insufficient weaponry.

• Ruderman, unmarred

From under- +‎ arm.

underarm c (singular definite underarmen, plural indefinite underarme)

1. (anatomy) forearm

• overarm

• “underarm” in Den Danske Ordbog

From under- +‎ arm.

underarm m (definite singular underarmen, indefinite plural underarmer, definite plural underarmene)

1. (anatomy) forearm

• overarm

• “underarm” in The Bokmål Dictionary.

From under- +‎ arm.

underarm m (definite singular underarmen, indefinite plural underarmar, definite plural underarmane)

1. (anatomy) forearm

• overarm

• “underarm” in The Nynorsk Dictionary.

under- +‎ arm

underarm c

1. (anatomy) forearm

• armbågsben (“ulna, elbow bone”)
• strålben (“radius, radial bone”)
• underben (“lower leg”)
• överarm (“upper arm”)

• underarm in Svensk ordbok (SO)
• underarm in Svenska Akademiens ordbok (SAOB)
• Svensk MeSH