στερεός stereós

Greek · Strong's G4731 · used 4 times in 4 verses

Meaning

stiff, i.e. solid, stable (literally or figuratively)

In the King James Version: stedfast, strong, sure

Derivation: from G2476 (ἵστημι);

2 Timothy 2:19 Nevertheless, God’s firm foundation stands, bearing this seal: “The Lord knows those who are His,” and, “Everyone who calls on the name of the Lord must turn away from iniquity.”
Hebrews 5:12 Although by this time you ought to be teachers, you need someone to reteach you the basic principles of God’s word. You need milk, not solid food!
Hebrews 5:14 But solid food is for the mature, who by constant use have trained their senses to distinguish good from evil.
1 Peter 5:9 Resist him, standing firm in your faith and in the knowledge that your brothers throughout the world are undergoing the same kinds of suffering.