Strong's #803: asphaleia (pronounced as-fal'-i-ah)

from 804; security (literally or figuratively):--certainty, safety.

Thayer's Greek Lexicon:

̓́

asphaleia

1) firmness, stability

2) certainty, undoubted truth

3) security from enemies and dangers, safety

Part of Speech: noun feminine

Relation: from G804

Citing in TDNT: 1:506, 87

Usage:

This word is used 3 times:

 

Luke 1:4: "That thou mightest know the certainty of those things, wherein thou hast been instructed."
Acts 5:23: "we shut with all safety, and the keepers standing"
1 Thessalonians 5:3: "they shall say, Peace and safety; then sudden destruction cometh upon"