twittering
呢喃
Twit·ter·ing, n.
1. The act of one who, or that which, twitters.
2. A slight nervous excitement or agitation, such as is caused by desire, expectation, or suspense.
A widow, who had a twittering towards a second husband, took a gossiping companion to manage the job. --L'Estrange.
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Twit·ter, v. i. [imp. & p. p. Twittered p. pr. & vb. n. Twittering.]
1. To make a succession of small, tremulous, intermitted noises.
The swallow twittering from the straw-built shed. --Gray.
2. To make the sound of a half-suppressed laugh; to titter; to giggle.
3. To have a slight trembling of the nerves; to be excited or agitated.