felicitous

Short definition from Wiktionary

Adjective

1. 1
   Characterized by felicity: Appropriate, apt, fitting.
2. 2
   Characterized by felicity: Auspicious, fortunate, lucky.
3. 3
   Characterized by felicity: Causing happiness or pleasure.
4. 4
   Of a sentence or utterance: semantically and pragmatically coherent; fitting in the context.