Third-person singular simple present indicative form of teach.(verb)
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Use "teacheth" in a sentence
"'Ye shall believe God, that plainly speaketh in His word; and farther than the word teacheth you, ye neither shall believe the one nor the other."
"The word teacheth us, that the spiritual man judgeth all things, 1"
"For it is not thy faith and repentance, as  Chrysostom truly teacheth, that is available, but God's mercy that is annexed to it, He accepts the will for the deed: so that I conclude, to feel in ourselves the want of grace, and to be grieved for it, is grace itself."