IPA: /ˈɑːrmhoʊl/
KK: /ˈɑrmˌhoʊl/
An opening in a piece of clothing where the arm goes through.
The dress has a wide armhole that allows for easy movement.
Armhole → The word is formed from "arm" (from Old English "earm", meaning the upper limb) and "hole" (from Old English "hol", meaning an opening or hollow space). An armhole refers to the opening in a garment where the arm fits through.
Think of the 'arm' as the upper limb and 'hole' as an opening — together, they describe the space where your arm goes in a piece of clothing.