G1128–γυμνάζω–gumnazō

and the profane and old women's fables reject thou, and exercise thyself unto piety,

γύμναζε gumnaze “do train”

and of perfect men is the strong food, who because of the use are having the senses exercised, unto the discernment both of good and of evil.

γεγυμνασμένα gegumnasmena “trained”

and all chastening for the present, indeed, doth not seem to be of joy, but of sorrow, yet afterward the peaceable fruit of righteousness to those exercised through it -- it doth yield.

γεγυμνασμένοις gegumnasmenois “trained”

having eyes full of adultery, and unable to cease from sin, enticing unstable souls, having an heart exercised in covetousnesses, children of a curse,

γεγυμνασμένην gegumnasmenēn “exercised”