| a combining form meaning “sleep”, used in the formation of compound words: somnifacient. |
| somn- pref. Variant of somni-. |
| somni- or somn- pref. Sleep: somnambulate. [From Latin somnus, sleep; see swep- in Indo-European roots.] |
somni- or somn-
pref.
Sleep: somnambulism.