(a.) Characterized by felicity; happy; prosperous; delightful; skilful; successful; happily applied or expressed; appropriate.

Ciceronian Demosthenian Demosthenic Tullian a propos ad rem adapted advantageous advisable affable agreeable amiable amicable applicable apposite appropriate apropos apt articulate auspicious becoming befitting blissful cheerful civil comely compatible complaisant congenial congruous convenient convincing cordial correct decent decorous desirable dovetailing dulcet eloquent en rapport enjoyable expedient facund fair fair and pleasant favorable feasible felicific fine fit fitted fitten fitting fortunate fructuous geared genial genteel germane glib good goodly gracious grateful gratifying happy harmonious heart-warming honeyed inspired just just right likable likely lucky meet mellifluous mellow meshing nice on the button opportune pat pertinent pleasant pleasing pleasurable pleasure-giving pleasureful politic profitable proper propitious providential qualified recommendable relevant rewarding right ripe satisfying seasonable seemly silver silver-tongued slick smooth smooth-spoken smooth-tongued sortable spellbinding suitable suited suiting sweet tailored telling timely to be desired to the point to the purpose urbane useful welcome well-chosen well-expressed well-put well-spoken well-timed wise worthwhile