joy 
(joi)
n.1. a. Intense and especially ecstatic or exultant happiness, or an instance of such feeling.
b. An expression of such feeling.
2. A source or an object of joy: their only child, their pride and joy.
v. joyed, joy·ing, joys
Archaic
v.intr. To take great pleasure; rejoice.
v.tr.1. To fill with ecstatic happiness, pleasure, or satisfaction.
2. To enjoy.
[Middle English joie, from Old French, from Latin gaudia, pl. of gaudium, joy, from gaudēre, to rejoice; see gāu- in the Appendix of Indo-European roots.]