happy
adjective
°Experiencing the effect of favourable fortune; having the feeling arising from the consciousness of well-being or of enjoyment; enjoying good of any kind, as peace, tranquillity, comfort; contented; joyous.
°Favored by hap, luck, or fortune; lucky; fortunate; successful; prosperous; satisfying desire.
"Chymists have been more happy in finding experiments than the causes of them - Boyle"