G2479
ἰσχύς
strength
ἰσχύς, -ύος, ἡ [in LXX chiefly for כֹּחַ, also for חַיִל, עַז, גְּבוּרָה, etc. ;] strength, might, power, force, ability: Rev.5:12 7:12; ἰ. κ. δύναμις, 2Pe.2:11; τ. κράτος τῆς ἰ. (Isa.40:26), Eph.1:19 6:10; ἡ δόξα τῆς ἰ., 2Th.1:9; ἐξ ἰ., 1Pe.4:11; ἐν ὅλῃ τ. ἰ., Mrk.12:30, 33" (LXX) Luk.10:27 (LXX).† SYN.: δύναμις (which see, and cf. ICC, Php.4:13); κράτος (cf. M, Th., I, 1:9) (AS)
The KJV translates G2479 in the following manner:
strength (8x), might (4x), power (4x), ability (2x), mightily (2x), mighty (2x)
Full Thayer's lexicon entry
ἰσχύς — ischýs
ἰσχύς, ἰσχύος, ἡ (ἴσχω (allied with ἔσχον; to hold in check)) (from Hesiod down), the Sept. especially for כֹּחַ, חַיִל, עֹז, גְּבוּרָה; ability, force, strength, might: 2Pe 2:11 (joined with δύναμις); Rev 5:12; Rev 7:12; τό κράτος τῆς ἰσχύος, power (over external things) afforded by strength, Eph 1:19; Eph 6:10 (Isa 40:26); ἡ δόξα τῆς ἰσχύος (see δόξα, III. 3 b. α. at the end), 2Th 1:9; κράζειν ἐν ἰσχύει, with strength, mightily, Rev 18:2 Rec.; ἐξ ἰσχύος, of one's strength, to the extent of one's ability, 1Pe 4:11; with ὅλης added, Mar 12:30; Mar 12:33; Luk 10:27 (here L text T Tr WH read ἐν ὅλῃ τῇ ἰσχύι). (Synonym: see δύναμις, at the end.)
10 occurrences
Mark (2), Luke (1), Ephesians (2), II Thessalonians (1), I Peter (1), II Peter (1), Revelation of John (2)