yodan verb with 'ru' ending (archaic), intransitive verb
to defecate; to expel feces
Archaic intransitive verb; not used in modern Japanese. Equivalent to modern 大便をする or 排便する.
古語では「糞放る」と書いて「くそまる」と読み、排便する意であった。
In classical Japanese, 糞放る was read くそまる and meant to defecate.
Modern medical/formal term for defecation; くそまる is archaic and not used today.
Common modern expression for having a bowel movement; くそまる is its archaic equivalent.
Compound of 糞 (くそ, 'feces') and 放る (まる, archaic verb meaning 'to excrete'). The exact historical derivation is uncertain.