This is the 16685th most frequent Russian word.
сисек
"Сисек" is the genitive plural form of "сиська," a colloquial term for "breast" or "boob."
Here, 'сисек' refers to the nipples of the kitten, indicating anatomical features.
У котёнка всего две сисек.
The kitten has only two nipples.
In this sentence, 'сисек' refers to the female breasts, used in a casual context.
Этот свитер подчёркивает форму сисек.
This sweater emphasizes the shape of the breasts.
Here, 'сисек' refers to the udders of the cow, denoting functional anatomy.