G4731–στερεός–stereos

Nevertheless the foundation of God standeth firm, having this seal, The Lord knoweth them that are his. And, Let every one that nameth the name of Christ depart from iniquity.

στερεὸς stereos “the firm”

For when for the time ye ought to be teachers, ye have need of one to teach you again which are the first principles of the oracles of God; and are become such as have need of milk, and not of strong food.

στερεᾶς stereas “of solid”

But strong food belongeth to them that are of full age, even those who by reason of use have their senses exercised to discern both good and evil.

στερεὰ sterea “solid”

Whom resist steadfast in the faith, knowing that the same afflictions are accomplished in your brethren that are in the world.

στερεοὶ stereoi “firm”