Definition, synonyms and related words
third-person singular simple present indicative form of have
"The old man hath a secret he refuses to share."
In plain English: Hath is an old-fashioned way of saying has that you mostly see in Shakespeare's plays now.
"In modern English, hath is not used as a verb in everyday speech because its standard form has is now simply is."
Hath comes from Old English and originally meant "has." It entered modern usage as the third-person singular form of the verb to have.