silently
adverb
[ ˈsʌɪləntli ]
• without making any sound.
• "she sobbed silently in the corner"
Similar:
quietly,
inaudibly,
noiselessly,
soundlessly,
in silence,
without a word,
saying nothing,
speechlessly,
unspeakingly,
wordlessly,
voicelessly,
dumbly,
mutely,
taciturnly,
reticently,
uncommunicatively,
without words,
in one's head,
tacitly,
implicitly,
subvocally,
unspokenly,