Synonyms of the word

tongue-tied

• adj. (idiomatic) Unable to express oneself clearly or fluently; at a loss for words.
• adj. Suffering from tongue-tie or ankyloglossia.

inarticulate

• adj. (of speech) not articulated in normal words.
• adj. speechless.
• adj. unable to speak with any clarity.
• adj. (biology) not having joints or other articulations.
• n. (zoology) An animal belonging to the subphylum Inarticulata.

incoherent

• adj. Lacking coherence or agreement; incongruous; inconsistent; not logically connected.
• adj. Not physically coherent; loose; unconnected.