na-adjective
quiet and subdued; solemn; gentle and sad
Describes an atmosphere, manner, or appearance that is quiet, restrained, and often tinged with sadness or solemnity. Commonly used for ceremonies, memorials, or subdued gatherings.
葬儀はしめやかに執り行われた。
The funeral was held in a quiet and solemn manner.
彼女はしめやかな様子で部屋を出ていった。
She left the room with a subdued and sad air.