What is a synonym for "armhole"?

Common synonyms include: air hole, arm opening, armholes, armpit, axilla, blowhole.

Armhole

/ˈɑɹmˌhoʊl/ noun

noun ·Rare ·Advanced level

Noun

1
A human armpit. Midlands, archaic, dialectal
"An aposteme gendred in þe purgynge places, þat is to say, of þe brayne vnder þe eres, of þe herte vnder þe arme holes, of þe lyuer in the schares."
2
a hole through which you put your arm and where a sleeve can be attached wordnet
3
Similar structures in other animals. obsolete, rare
4
A hole for an arm in a piece of clothing.
"He... violently pull'd off her Riding-Hood, and tore it at the Arm Holes in pulling it off."

"An aposteme gendred in þe purgynge places, þat is to say, of þe brayne vnder þe eres, of þe herte vnder þe arme holes, of þe lyuer in the schares."

From Middle English arme hole, armehole, arm hole, arm-hole, armhole, arm-hool(e), armole, harmehole; equivalent to arm + hole.