From the ArcaMax Publishing, Vocabulary Newsletter:
http://www.arcamax.com/news/vocabulary/s-568861-442050
felicitous \fuh-LIS-uh-tuhs\ (adjective) - 1 : Suitably applied or
expressed; appropriate; apt. 2 : Happy; delightful; marked by good
fortune.
"His end fell well on the feast of Felix, for he was felicitous in all
things ; felicitous in endowing the church, felicitous in ordering
more clearly the divine offices, felicitous in the administration of
justice, and, in fine, felicitous in all his life." -- John Capgrave,
'The Book of the Illustrious Henries'
Felicitous is derived from Latin felicitas, "fertility, hence success,
happiness," from felix, "fertile, successful, happy."