Root خ ف ت(x f t) has 2 unique word forms and appears 3 times in the Quran.

English gloss Inaudible, Fading, Silence

Word Translation Occurrences
يَتَخَٰفَتُونَ lowered (their) voices, lowered (their) voices, They are murmuring, They are murmuring 4
تُخَافِتۡ be silent, be silent 2