G4731–στερεός–stereos

Yet the firm foundation of God stands, having this seal, [ergänzt: The] Lord knows those that are his; and, Let every one who names the name of [ergänzt: the] Lord withdraw from iniquity.

στερεὸς stereos “the firm”

For when for the time ye ought to be teachers, ye have again need that [ergänzt: one] should teach you what [ergänzt: are] the elements of the beginning of the oracles of God, and are become such as have need of milk, [ergänzt: and] not of solid food.

στερεᾶς stereas “of solid”

but solid food belongs to full-grown men, who, on account of habit, have their senses exercised for distinguishing both good and evil.

στερεὰ sterea “solid”

Whom resist, stedfast in faith, knowing that the selfsame sufferings are accomplished in your brotherhood which [ergänzt: is] in [ergänzt: the] world.

στερεοὶ stereoi “firm”