Third-person singular simple present indicative form of profit.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "profiteth" in a sentence
"What profiteth a producer if he gains the Tony but loses the audience?"
"And though I bestow all my goods to feed the poor, and though I give my body to be burned, and have not charity, it profiteth me nothing."
"Law profiteth him who practiseth it: so love thy brother, if he be of this quality and do not cast him off, even if thou see in him that which irketh thee, for a friend is not I like a wife, whom one can divorce and re-marry: nay, his heart is like glass: once broken, it may not be mended."