G0803
ἀσφάλεια
security
ἀσφάλεια, -ας, ἡ (ἀσφαλής), [in LXX for בָּטַח, etc. ;] __1. firmness. __2. certainty: Luk.1:4. __3. security: Act.5:23, 1Th.5:3. (In π. it is used as a law-term, proof, security; see MM, see word; M, Th., l.with)† (AS)
Full Thayer's lexicon entry
ἀσφάλεια — aspháleia
ἀσφάλεια, ἀσφαλείας, ἡ (ἀσφαλής) (from Aeschylus down);
a. firmness, stability: ἐν πάσῃ ἀσφάλεια most securely, Act 5:23. tropically, certainty, undoubted truth: λόγων (see λόγος, I. 7), Luk 1:4 (τοῦ λόγου, the certainty of a proof, Xenophon, mem. 4, 6, 15).
b. security from enemies and dangers, safety: 1Th 5:3 (opposed to κίνδυνος, Xenophon, mem. 3, 12, 7).
3 occurrences
Luke (1), Acts (1), I Thessalonians (1)