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“somnambulator”
A person who walks while he or she is asleep.
![A somnambulator is walking during the night.](http://www.wordinfo.info/words/images/Sleep-Walking-1.jpg)
This entry is located in the following units:
ambul-, ambulat-, -ambulate, -ambulating, -ambulation -ambulator, -ambulatory, -ambulant, -ambulic, -ambulism, -ambulist
(page 6)
somni-, somno-, somn-, -somnia, -somniac
(page 2)