speechless
adjective
[ ˈspiːtʃləs ]
• unable to speak, especially as the temporary result of shock or strong emotion.
• "he was speechless with rage"
Similar:
lost for words,
at a loss for words,
struck dumb,
dumbstruck,
bereft of speech,
tongue-tied,
unable to get a word out,
inarticulate,
mute,
dumb,
voiceless,
dumbfounded,
thunderstruck,
shocked,
shell-shocked,
astounded,
aghast,
amazed,
dazed,
flabbergasted,
mum,
knocked/hit for six,
gobsmacked,
dumbstricken,
mumchance,
obmutescent,
silent,
unspoken,
unexpressed,
wordless,
unsaid,
unvoiced,
Origin:
Old English spǣclēas (see speech, -less).