n.
恰当, 适合

[ noun ]
pleasing and appropriate manner or style (especially manner or style of expression)
<noun.attribute>

Felicitous \Fe*lic"i*tous\, a.
Characterized by felicity; happy; prosperous; delightful;
skillful; successful; happily applied or expressed;
appropriate.

Felicitous words and images. --M. Arnold.
-- {Fe*lic"i*tous*ly}, adv. -- {Fe*lic"i*tous*ness}, n.

felicitousness \fe*lic"i*tous*ness\ n.
a pleasing and appropriate manner or style, especially of
expression.

Syn: felicity.
[WordNet 1.5]