Joyous
来自Big Physics
wiktionary
From Middle English joyous, joious, from Old French joieus, from joie + -eus.
etymonline
joyous (adj.)
c. 1300, from Anglo-French joyous, Old French joios "happy, cheerful, merry, glad" (12c., Modern French joyeux), from joie (see joy). Related: Joyously; joyousness.
