Underarm vs. Armpit

Located, placed, or used under the arm.

The hollow under the upper part of the arm at the shoulder.

(Sports) Executed with the hand brought forward and up from below the level of the shoulder; underhand.

(Slang) The most miserable or undesirable place in a particular area.

With an underarm motion or delivery.

The cavity beneath the junction of the arm and shoulder.

The armpit.

Somewhere or something considered unpleasant or undesirable.

The armpit.

The hollow beneath the junction of the arm and shoulder; the axilla.

(cricket) Old-fashioned and now outlawed style of bowling in which the arm is not swung over the shoulder.

The hollow under the arm where it is joined to the shoulder;

For use under the arm.

(transitive) To supply with insufficient weaponry.

With hand brought forward and up from below shoulder level;

With the hand swung below shoulder level';