early 15c., "supreme happiness," from Middle French béatitude (15c.) and directly from Latin beatitudinem (nominative beatitudo) "state of blessedness," from past participle stem of beare "make happy" (see Beatrice). Attested from 1520s as "a declaration of blessedness" (usually plural, beatitudes, especially in reference to the Sermon on the Mount).
beater
beatific
beatification
beatify
beating
beatitude
Beatlemania
Beatles
beatnik
Beatrice
beau