Strong's #8107: shimmur (pronounced shim-moor')

from 8104; an observance:--X be (much) observed.

Brown-Driver-Briggs Hebrew Lexicon:

ּׁ

shimmûr

1) night watch, watching, vigil

Part of Speech: noun masculine

Relation: from H8104

Usage:

This word is used 2 times:

 

Exodus 12:42: "It is a night to be much observed unto the LORD for bringing them out from the land of Egypt:"
Exodus 12:42: "this is that night of the LORD to be observed of all the children of Israel"