皹, 皸, 胼: a crack in one's skin due to chapping from exposure to cold and dry conditions · 罅: a crack, as in the surface of glass, ceramic, dried mud, or some other material · 罅: (figurative) a crack in one's psyche: psychological trauma, emotional pain
köken: /fimi/ → /fibi/ → /hibi/ First attested in an 1177–1181 edition of the 色葉字類抄 (Iroha Jiruishō), an early dictionary of kanji characters, in the entry for the kanji 瘃. Sound shift from older ひみ (fimi), itself first attested in 850. The sense appears to have originally been limited to chapped, cracked, possibly even extending to frostbitten, in reference to how one's skin in winter can become red,…