バ

ッ

ク

noun

1. back, rear.
2. background, backdrop.

noun, takes する

1. backing (up), going backwards, reversing.

noun

1. backing, support, backer, supporter.

noun, takes する

1. refunding.

noun

1. backstroke (swimming). Abbreviation.
2. Sports term.backhand. Abbreviation.
3. doggy style (sexual position). Slang.