FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

psithurismos ψιθυρισμός — psith-oo-ris-mos' — from a derivative of psithos (a whisper; by implication, a slander; probably akin to 5574); whispering, i.e. secret detraction:--whispering.

see GREEK for 5574