2891  taher  taw-hare'

 a primitive root; properly, 
to be bright; i.e. (by 
implication) to be pure 
(physical sound, clear, 
unadulterated; Levitically, 
uncontaminated; morally, 
innocent or holy):--be (make, 
make self, pronounce) clean, 
cleanse (self), purge, 
purify(-ier, self).