This is the 7429th most frequent Dutch word.
borsten
Breasts.
Here, 'borsten' refers to the anatomical parts of the body, specifically breasts, in a descriptive or clinical context.
De vrouw kijkt in de spiegel en inspecteert haar borsten.
The woman looks in the mirror and inspects her breasts.
In this case, 'borst' (singular form of 'borsten') is used metaphorically to refer to the chest area of the torso in a general sense.
Tijdens het sporten droeg hij een shirt met een logo op zijn borst.
During the workout, he wore a shirt with a logo on his chest.
Here, 'borst' is again used to signify the chest area as a physical location for interaction in the scenario described.