Noun

opposite side; bottom; other side; side hidden from view; undersurface; reverse side

rear; back; behind

lining; inside

in the shadows; behind the scenes; offstage; behind (someone's) back

more (to something than meets the eye); hidden side (e.g. of one's personality); unknown circumstances; different side

proof

see 裏付け

opposite (of a prediction, common sense, etc.); contrary

see 裏をかく

inverse (of a hypothesis, etc.)

bottom (of an inning); last half (of an inning)

Baseball