Definitions: (1) suitable to the occasion <as a well-chosen word or phrase>; (2) apropos and pleasing in expression or style; pertinent and to the point; (3) having an aptness that is opportune, telling, or graceful; (4) happy; pleasant; delightful; enjoyable
     See also: Appropriate

Derivation: Latin, “lucky,” “to make happy”

Synonyms: joyous, successful, timely

• Human felicity is produced not as much by great pieces of good fortune that seldom happen as by little advantages that occur every day. — Benjamin Franklin (1705-1790) American polymath [eight disciplines]
• The pause – that impressive silence, that eloquent silence, that geometrically progressive silence which often achieves a desired effect where no combination of words, howsoever felicitous, could accomplish it. — Mark Twain [born Samuel Langhorne Clemens] (1835-1910) American humorist