G3306–μένω–menō

for the truth's sake, which remains in us, and it will be with us forever:

μένουσαν menousan “is abiding”

Whoever transgresses and doesn't remain in the teaching of Christ, doesn't have God. He who remains in the teaching, the same has both the Father and the Son.

μένων menōn “abiding”μένων menōn “abiding”

They are seven kings. Five have fallen, the one is, the other has not yet come. When he comes, he must continue a little while.

μεῖναι. meinai “to remain.”