[somnambul-] comb form [NL, fr. somnambulus somnambulist, fr. L somnus sleep + -ambulus (as in funambulus funambulist)--more at somnolent]: somnambulism: somnambulist "somnambulant"
SOMNAMBUL-
Meaning of SOMNAMBUL- in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012