Felicitous (adjective)

1. Well-suited to the circumstances; apt or appropriate.
2. Giving pleasure or satisfaction; pleasing.

Origin:

From the latin word felicitus, meaning "happy, fortunate".

Examples:

1. The felicitous choice of words made the speech a success.
2. It was a felicitous coincidence that we met at the party.
3. The felicitous combination of flavors in the dish was a delight.
4. He made a felicitous comment on the situation.
5. The felicitous design of the building was praised by critics.