[adjective] [not gradable]Her injuries left her speechless (= unable to talk).Speechless also means temporarily unable to talk or to know what to say, esp. because of having strong feelings.Everyone who has worked with John will be speechless when they find out what has happened to him.The news left/rendered us speechless.She was speechless with indignation.
SPEECHLESS
Meaning of SPEECHLESS in English
Cambridge English vocab. Кембриджский английский словарь. 2012