tongue-tied

Having tongue-tie or ankyloglossia (“a congenital oral anomaly in which the lingual frenulum (a membrane connecting the underside of the tongue to the floor of the mouth) is unusually short and thick, decreasing mobility of the tongue and a

Prevented from or unable to express oneself clearly or fluently, or freely; at a loss for words, speechless.

But it ſeemes to mee that Dauid meeneth cheefly, that among the blaſphemies of his foes wherewith they endeuered too ouerwhelme hys Faythe, he himſelfe was not tungtyde: but rather lifted vp his voyce vnto God, whom the vngodly ſurmiſed to haue bin turned against him.

My toung-tide Muſe in manners holds her ſtill, / While comments of your praiſe richly compil'd, / Reſerue their Character with goulden quill, / And precious phraſe by all the Muſes fil'd.

Reluctant to speak up; reserved, reticent.

I was all this while chafing at the part I played, and sitting tongue-tied between shame and merriment; but somehow at this I could hold in no longer, and bade Alan let me be, for I was better already.

Tongue-tied or short of breath / Don't even try

Physically unable to speak; dumb, mute.