Strong's #5263: nacac (pronounced naw-sas')
a primitive root; to wane, i.e. be sick:--faint.
Brown-Driver-Briggs Hebrew Lexicon:
nâsas
1) (Qal) to be sick
Part of Speech: verb
Relation: a primitive root
Usage:
This word is used 1 times:
Isaiah 10:18: "both soul and body: and they shall be as when a standard-bearer fainteth."