In sound hermeneutics, the etymological meaning of a word must give place to the current established usage.
to determine the usage of a word, consult its occurrences in literature, and depend most on those nearest the passage in point of context, authorship, date and character of the composition.
Not so: you are bound to understand what the WRITER had in mind when they wrote where context counts.
Words CANNOT be defined: you can only find where the word is used in the literature of the time. No church father, founder of denomination or Bible version translates it PLAY A HARP.
False: you are bound to find in the Bible or in any recorded literature where psallo MEANS to "Play A Harp."
Remember: I insist that you find ONE WORD translated to PLAY A HARP.
I can show you one COMPOUND word to mean PLAY AN INSTRUMENT for EVERY type of instrument.