tongue-tied

listen to the pronunciation of tongue-tied
الإنجليزية - الإنجليزية
unable to speak; at a loss for words

If you have never practiced at interviewing for a job, you are likely to have a few tongue-tied moments during your first interview.

does not know what to say, shy
If someone is tongue-tied, they are unable to say anything because they feel shy or nervous. In their presence I became self-conscious and tongue-tied. unable to talk in a relaxed way because you feel nervous or embarrassed
unable to express yourself clearly or fluently; "felt tongue-tied with embarrassment"; "incoherent with grief"
tonguetied
{a} having a lisping or bad speech
tongue tie
a congenital anomaly in which the mucous membrane under the tongue is too short limiting the mobility of the tongue
tonguetied
Unable to speak freely, from whatever cause
tonguetied
when caused by a short frænum
tonguetied
Destitute of the power of distinct articulation; having an impediment in the speech, esp
was tongue-tied
was silent, was quiet, did not know what to say