バナナの皮[banananokawa] banana peel
一皮[hitokawa] unmasking
化の皮[bakenokawa] masking one's true character
化けの皮をはぐ[bakenokawawohagu] to unmask (someone's true nature)
果皮[kahi] pericarp (ripened ovary wall forming part of a fruit)

外皮[gaihi] investment (in the sense of outer layer)
角皮[kakuhi] cuticle
桜皮[kanba] birch (esp. Japanese white birch)
乾皮[kanpi] dried hides
雁皮紙[ganpishi] traditional Japanese paper made from the fibre of plant species Diplomorpha sikokiana (high quality, glossy)

犬薄荷[inuhakka] catnip (Nepeta cataria)
意志薄弱[ishihakujaku] weak-willed
佳人薄命[kajinhakumei] beauties die young
極薄[kyokuhaku] ultrathinness
軽薄[keihaku] frivolous

軽佻浮薄[keichoufuhaku] frivolous and thoughtless
厚薄[kouhaku] thickness
精神薄弱[seishinhakujaku] mental retardation
精薄[seihaku] mental retardation (pejorative)
浅薄[senpaku] shallowness