G4417–πταίω–ptaiō

I say then, Have they stumbled that they should fall? By no means: but rather through their fall salvation is come to the Gentiles, to provoke them to jealousy.

ἔπταισαν eptaisan “they did stumble”

For whoever 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 all offend. If any man offendeth not in word, the same is a perfect man, 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”