Main Entry: stam·mer

Pronunciation: \ˈsta-mər\

Function: verb

Inflected Form(s): stam·mered; stam·mer·ing \ˈsta-mə-riŋ, ˈstam-riŋ\

Etymology: Middle English stameren, from Old English stamerian; akin to Old High German stamalōn to stammer, Old Norse stemma to hinder, damn up — more at stem

Date: before 12th century

intransitive verb : to make involuntary stops and repetitions in speakingtransitive verb : to utter with involuntary stops or repetitions

— stammer noun

— stam·mer·er \-mər-ər\ noun