Strong's G5567 — ψάλλω (verb)
psallo (psal'-lo) v.
1. to twitch or twang, i.e. to play on a stringed instrument (celebrate the divine worship with music and accompanying odes)
[probably strengthened from psao "to rub or touch the surface"]
KJV: make melody, sing (psalms) 
Compare: G5597 
Occurrences: 5