Slumber

DEF: Sleep, to lie dormant, latent.

EX:

Kids who sleep well learn well: Tips for encouraging healthy slumber.

Industrial fairs return to Toronto after the pandemic slumber.

A slumber party is a party in which all the guests spend the night at the house where the party is held.

Merriam-Webster Online Dictionary
slumber (verb)
intransitive verb
1.
a) to sleep lightly - doze
b) - sleep
2.
a) to be in a torpid, slothful, or negligent state
b) to lie dormant or latent
slumber (noun)
1.
a) - sleep
b) a light sleep
2.
- lethargy torpor