ARMHOLE
Meaning of ARMHOLE in English
arm ‧ hole /ˈɑːmhəʊl $ ˈɑːrmhoʊl/ BrE AmE noun [countable]
a hole in a shirt, dress, jacket etc that you put your arm through
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012