1. The hollow place under the shoulder.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• ammit,
• rampit,
• amdit,
• armpitts,
• abpit,
• arpet,
• aopmict,
• armpet,
• zrmpit,
• srmpit,
• wrmpit,
• qrmpit,
• aempit,
• admpit,
• afmpit,
• atmpit,
• a5mpit,
• a4mpit,
• arnpit,
• arkpit

The adjective form of the word "armpit" is "axillary".

The plural of the "armpit" can be the "armpits".

The singular of the "armpit" can be the "armpit".