This is the 3899th most frequent Arabic word.
الناعمة
"The soft" or "the gentle."
Here, 'الناعمتين' describes the hands as being 'soft', expressing a physical quality.
تمتلك الفتاة يديها الناعمتين.
The girl has soft hands.
In this sentence, 'الناعم' describes the voice as 'soft', relating to its gentle sound.
صوتها الناعم يبعث الهدوء في المكان.
Her soft voice brings calmness to the place.
The usage of 'الناعمة' here refers to the brush being 'soft', probably describing its texture or material.