This radical has actually the meaning: corpse 尸. But due to its use in tail 尾, urine 尿, or flatulence 屁, it is considered to generally mean 'buttocks'.
Tip: Go to the radicals that are contained in this character and learn all the characters with this radical systematically!
Vocabulary
细胞壁
xì bāo bì
cell wall
4236
白壁微瑕
bái bì wēi xiá
a slight blemish
9611
白壁无瑕
bái bì wú xiá
impeccable moral integrity
9610
悬崖峭壁
xuán yá qiào bì
cliffside
7638
峭壁
qiào bì
cliff; steep; precipice
7637
颓垣断壁
tuí yuán duàn bì
crumbling fences and dilapidated walls (idiom)
7533
崖壁
yá bì
escarpment; precipice; cliff
5893
戈壁
Gē bì
Gobi (desert)
4745
壁画
bì huà
mural (painting); fresco
4238
隔壁
gé bì
next door; neighbor
4237
阴道棕榈状壁
yīn dào zōng lǘ zhuàng bì
palmate folds of cervical canal; plicae palmatae canalis cervicis uteri
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