裏 backside

(beret) + 里 (village) +

(kick in the nuts)

★★★★★

13 strokes

This tends to use KUNYOMI in most of its jukugo.

Onyomi

Mnemonic

If you wear a beret in the back part of the village, you'll get kicked in the nuts. It's a rough 'hood.

Kunyomi

うら	sorry to disappoint, it don't mean backside like 'booty,' but backside like, 1) the back side of a building, behind something where few people go. 2) the 'dark side' - illegal or hidden side of something. ★★★★★

Jukugo

裏(うら) XXX	hidden side of xxx ★★★☆☆ SUF SUFFIX meaning, 'hidden side' or 'dark side' of XXX.
裏切り(うらぎり)	backstab ★★★☆☆ 裏 (backside) + 切 (cut / important) = 裏切り (backstab) backstabbing (verb form:　うらぎる！）
裏切り者(うらぎりもの)	traitor ★☆☆☆☆ KUN ON 裏 (backside) + 切 (cut / important) + 者 (professional) = 裏切り者 (traitor)
裏本(うらぼん)	illegal porno books with no mosaic. ☆☆☆☆☆ KUNKUN 裏 (backside) + 本 (book / the real) = 裏本 (illegal porno books with no mosaic.)