taru-adjective, adverb taking the 'to' particle
Archaic literary word describing a bleak, empty, and lonely atmosphere, often of a landscape or scene. Used in classical Japanese and occasionally in modern literary or poetic contexts.
蕭寥たる冬の野原を一人歩いた。
I walked alone across the desolate winter field.
古寺のあたりは蕭寥として人影もなかった。
The area around the old temple was lonely and barren, with no sign of people.