in a soft voice
careful; fine; slender; thin; thinly; thinness; trifling
【计】 mic-
【医】 lepto-; micr-; micro-; mikro-; tenuity
make a sound; reputation; sound; tone; voice
【化】 sound
【医】 phon-; phono-; sonus; sound
gas
【医】 aer-; aero-; air; atmo-; physo-; pneuma; pneuma-; pneumato-; pneumo-