G4192–πόνος–ponos

For I bear him witness, that he hath much labor for you, and for them in Laodicea, and for them in Hierapolis.

πόνον ponon “labour”

And the fifth poured out his bowl upon the throne of the beast; and his kingdom was darkened; and they gnawed their tongues for pain,

πόνου ponou “distress”

and they blasphemed the God of heaven because of their pains and their sores; and they repented not of their works.

πόνων ponōn “distresses”

and he shall wipe away every tear from their eyes; and death shall be no more; neither shall there be mourning, nor crying, nor pain, any more: the first things are passed away.

πόνος ponos “pain”