somnambulist
noun/sɒmˈnæmbjəlɪst/
/sɑːmˈnæmbjəlɪst/
(formal)- a sleepwalker (= a person who walks around while they are asleep)Word Originlate 18th cent.: from French somnambulisme, from Latin somnus ‘sleep’ + ambulare ‘to walk’ + -ist.
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somnambulist