joy (n.) Look up joy at Dictionary.com
c.1200, "feeling of pleasure and delight;" c.1300, "source of pleasure or happiness," from Old French joie (11c.), from Latin gaudia, plural of gaudium "joy," from gaudere "rejoice," from PIE root *gau- "to rejoice" (cognates: Greek gaio "I rejoice," Middle Irish guaire "noble"). Joy-riding is American English, 1908.