Dictionary entry

ἀσφαλής

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

ἀσφαλής, -ές

(< ἀ- neg., σφάλλω, to trip up), [in LXX for אשׁר pu., etc.;]

certain, secure, safe: Ac 21:3422:3025:26, Phl 3:1, He 6:19 (MM, s.v.).†