Strong's #4533: macveh (pronounced mas-veh')
apparently from an unused root meaning to cover; a veil:--vail.
Brown-Driver-Briggs Hebrew Lexicon:
masveh
1) veil
Part of Speech: noun masculine
Relation: apparently from an unused root meaning to cover
Usage:
This word is used 3 times:
Exodus 34:33: "speaking with them, he put a veil on his face."
Exodus 34:34: "the LORD to speak with him, he took the veil off, until he came out."
Exodus 34:35: "and Moses put the veil upon his face again, until he went in"