speechless

Lacking the faculty of speech.

Temporarily unable to speak, as through astonishment.

Refraining from speech; silent.

Unexpressed or inexpressible in words.

Not having or not using the faculty of speech; unable to speak; dumb; mute.

Refraining or restrained from speech; not speaking, either of purpose or from present inability: as, to stand speechless before one′ s accusers; speechless from terror.

Characterized by the absence of speech; unexpressed; unattended by spoken words.

Using few words; concise.

Destitute or deprived of the faculty of speech.

Not speaking for a time; dumb; mute; silent.