G4731–στερεός–stereos

But God's strong base is unchanging, having this sign, The Lord has knowledge of those who are his: and, Let everyone by whom the name of the Lord is named be turned away from evil.

στερεὸς stereos “the firm”

And though by this time it would be right for you to be teachers, you still have need of someone to give you teaching about the first simple rules of God's revelation; you have become like babies who have need of milk, and not of solid food.

στερεᾶς stereas “of solid”

But solid food is for men of full growth, even for those whose senses are trained by use to see what is good and what is evil.

στερεὰ sterea “solid”

Do not give way to him but be strong in your faith, in the knowledge that your brothers who are in the world undergo the same troubles.

στερεοὶ stereoi “firm”