G4417–πταίω–ptaiō

I say then, Have they stumbled that they should fall? God forbid: but rather through their fall salvation is come unto the Gentiles, for to provoke them to jealousy.

ἔπταισαν eptaisan “they did stumble”

For whosoever shall keep the whole law, and yet offend in one point, he is guilty of all.

πταίσῃ ptaisē “may stumble”

For in many things we offend all. If any man offend not in word, the same is a perfect man, and able also to bridle the whole body.

πταίομεν ptaiomen “we stumble”πταίει, ptaiei “does stumble,”

Wherefore the rather, brethren, give diligence to make your calling and election sure: for if ye do these things, ye shall never fall:

πταίσητέ ptaisēte “shall you stumble”