小声的

[ adj ]
spoken in soft hushed tones without vibrations of the vocal cords
<adj.all>
a long whispered conversation

Whisper \Whis"per\, v. i. [imp. & p. p. {Whispered}; p. pr. &
vb. n. {Whispering}.] [AS. hwisprian; akin to G. wispern,
wispeln, OHG. hwispal?n, Icel. hv[=i]skra, Sw. hviska, Dan.
hviske; of imitative origin. Cf. {Whistle}.]
1. To speak softly, or under the breath, so as to be heard
only by one near at hand; to utter words without sonant
breath; to talk without that vibration in the larynx which
gives sonorous, or vocal, sound. See {Whisper}, n.

2. To make a low, sibilant sound or noise.

The hollow, whispering breeze. --Thomson.

3. To speak with suspicion, or timorous caution; to converse
in whispers, as in secret plotting.

All that hate me whisper together against me. --Ps.
xli. 7.