This is the 10675th most frequent Russian word.
волосами
The Russian word "волосами" means "hair" in the instrumental plural form, typically used to indicate "with (the) hair."
In this sentence, the context of 'волосами' is describing the physical attribute being combed.
У неё длинные волосы, которые она бережно расчёсывает своим гребнем.
She has long hair, which she carefully combs with her comb.
Here, 'волосами' indicates the subject being described as shining.
Её волосы блестят на солнце после нанесения масла.
Her hair shines in the sun after applying the oil.
The word 'волосами' here refers to the action affecting the hair.