The word "哀悼" is formed by combining the characters "哀" and "悼". "哀" is composed of "口" (mouth) and "衣" (clothing), reflecting the expression of sorrow, often associated with mourning attire or vocal lamentation. "悼" consists of "忄" (heart) and "卓" (primarily phonetic), indicating grief felt internally. Together, they create a compound meaning "to mourn" or "express grief".