Stammer

Webster's Dictionary

(1): ( v. i.) To make involuntary stops in uttering syllables or words; to hesitate or falter in speaking; to speak with stops and diffivulty; to stutter.

(2): ( v. t.) To utter or pronounce with hesitation or imperfectly; - sometimes with out.

(3): ( n.) Defective utterance, or involuntary interruption of utterance; a stutter.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

( עַלֵּג , Illeg, a stutterer,  Isaiah 32:4; לָעִג , laag [transposed from the foregoing], properly to speak unintelligibly,  Isaiah 32:4; hence to Mock or deride ["laughter," etc.],  Isaiah 28:11;  Isaiah 33:19).