nidan verb (lower class) with 'ru' ending (archaic), intransitive verb
Archaic intransitive verb; the modern equivalent is 侘びる (わびる). Found in classical Japanese texts.
See also: 侘びる
古歌に「世の中を侘ぶる心は」とある。
In an old poem, there is a line: 'A heart that grieves over the world.'