G4731–στερεός–stereos

Yet God's solid foundation stands unmoved, bearing this inscription, "The Lord knows those who really belong to Him." And this also, "Let every one who names the Name of the Lord renounce all wickedness."

στερεὸς stereos “the firm”

For although, considering the long time you have been believers, you ought now to be teachers of others, you really need some one to teach you over again the very rudiments of the truths of God, and you have come to require milk instead of solid food.

στερεᾶς stereas “of solid”

Such persons are mere babes. But solid food is for adults--that is, for those who through constant practice have their spiritual faculties carefully trained to distinguish good from evil.

στερεὰ sterea “solid”

Withstand him, firm in your faith; knowing that your brethren in other parts of the world are passing through just the same experiences.

στερεοὶ stereoi “firm”