ψάλλω
[in LXX chiefly for זָמַר pi. (Jdg.5:3, Psa.7:17, al.), also for נָגַן pi. (1Ki.16:16 ff, al.) ;]
__1. to pull, twitch, twang (as a bowstring, etc.; Æsch., Eur., al.), hence,
__2. absol.,
__(a) to play a stringed instrument with the fingers (Hdt., Plat., al.);
__(b) later, to sing to a harp, sing psalms (LXX); in NT, to sing a hymn, sing praise: Jas.5:13; with dative of person(s), Rom.15:9 (LXX), Eph.5:19; dative instr., 1Co.14:15.†
(AS)