yodan verb with 'ru' ending (archaic), transitive verb
Archaic transitive verb; in modern Japanese, this meaning is expressed by 排泄する or more specific verbs. The reading まる is not productive today.
古語では「放る」と書いて「まる」と読み、排泄する意を表した。
In classical Japanese, 放る was read as まる and meant 'to excrete'.