This is the 10486th most frequent Swedish word.
knäet
"The knee."
Here, 'knä' refers to a physical body part, specifically the knee joint.
Jag slog mitt knä mot bordet.
I hit my knee against the table.
In this sentence, 'knä' is used metaphorically to refer to a lap as the upper legs form a surface when seated.
Barnet satt i sin mors knä.
The child sat on their mother's lap.
The word 'knä' again refers to the knee joint as a part of the body experiencing sensation.