nidan verb (lower class) with 'ru' ending (archaic), yodan verb with 'ru' ending (archaic), intransitive verb
get free; be released
Archaic intransitive verb meaning 'to become free' or 'to be released'. The modern form is 放れる (はなれる).
See also: 放れる
古語では「鳥が籠から放る」のように使われた。
In classical language, it was used like 'the bird gets free from the cage'.