FROM STRONG’S HEBREW DICTIONARY (1890)

Strong’s Hebrew Dictionary (1890) — public domain, printed whole.

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).