Vous avez cherché: speechless (Anglais - Latin)

elinguis, elinguis, elingue speechless or without eloquence;
elingue

and the men which journeyed with him stood speechless, hearing a voice, but seeing no man.
sed surge et ingredere civitatem et dicetur tibi quid te oporteat facere viri autem illi qui comitabantur cum eo stabant stupefacti audientes quidem vocem neminem autem vidente

and he saith unto him, friend, how camest thou in hither not having a wedding garment? and he was speechless.
et ait illi amice quomodo huc intrasti non habens vestem nuptialem at ille obmutui

and when he came out, he could not speak unto them: and they perceived that he had seen a vision in the temple: for he beckoned unto them, and remained speechless.
egressus autem non poterat loqui ad illos et cognoverunt quod visionem vidisset in templo et ipse erat innuens illis et permansit mutu

infans, infantis infant; child (bee); infans, (gen.), infantis speechless, inarticulate; new born; childish, foolish;
infans