from 5567; a set piece of music, i.e. a sacred ode (accompanied with the voice, harp or other instrument; a "psalm"); collectively, the book of the Psalms:

KJV-- psalm. Compare 5603.

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5567 psallo (psal'-lo);

probably strengthened from psao (to rub or touch the surface; compare 5597); to twitch or twang, i.e. to play on a stringed instrument (celebrate the divine worship with music and accompanying odes):

KJV-- make melody, sing (psalms).