Underarm vs. Armpit

Underarm and Armpit Definitions
Underarm
Located, placed, or used under the arm.
Armpit
The hollow under the upper part of the arm at the shoulder.
Underarm
(Sports) Executed with the hand brought forward and up from below the level of the shoulder; underhand.
Armpit
(Slang) The most miserable or undesirable place in a particular area.
Underarm
With an underarm motion or delivery.
Armpit
The cavity beneath the junction of the arm and shoulder.
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Underarm
The armpit.
Armpit
Somewhere or something considered unpleasant or undesirable.
The armpit of America
Underarm
The armpit.
Armpit
The hollow beneath the junction of the arm and shoulder; the axilla.
Underarm
(cricket) Old-fashioned and now outlawed style of bowling in which the arm is not swung over the shoulder.
Armpit
The hollow under the arm where it is joined to the shoulder;
They were up to their armpits in water
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Underarm
For use under the arm.
Underarm
(transitive) To supply with insufficient weaponry.
Underarm
With hand brought forward and up from below shoulder level;
An underhand pitch
An underhand stroke
Underarm
With the hand swung below shoulder level';
Throwing a ball underarm