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)