back, amidst, in, reverse, inside, palm, sole, rear, lining, wrong side
裏 centers on the hidden or opposite side of something: the back, the inside, the reverse, or the wrong side. It extends naturally to the palm or sole as the inner surface, and to lining as the inner layer.
裏 combines 衣 (clothing) and 里, which likely contributes the sound. The idea is the inside or lining of a garment, extended to the back or reverse side of things.
The 衣 (clothing) wraps around 里, like the inner lining hidden inside a coat. Picture turning a jacket inside out to see the back side.
For リ, imagine reaching inside the lining of a coat and pulling out a single reed (リード, riido) that was hidden there: reed -> リ.
opposite side; bottom; other side; side hidden from view; undersurface; reverse side
to betray; to turn traitor (to); to double-cross; to go back on; to be unfaithful (to)
the reverse (side); back (side); other side; hidden side; behind the scenes
treachery; betrayal; perfidy
back (side); reverse
back (side); reverse
support (e.g. for an argument); backing; proof; evidence; corroboration; substantiation; guarantee; security
betrayer; traitor; turncoat; informer
inside out; upside down
opposite; reverse; contrary
back and front; inside and outside; both sides
offstage; backstage; behind the scenes
someone working behind-the-scenes; scene shifter
to support (a theory, claim, etc.); to back up; to substantiate; to prove
one's mind
backdoor; rear entrance; rear exit
reverse side
front and back; inside and outside; two sides; both sides
bribe
side street (often parallel to a main street); back street; alley; alleyway
back lane; byway; back street
to turn inside out; to turn the other way; to turn (something) over
back gate