knee

drawn-up

She sat on the floor with her drawn-up knees hugged close to her chest.

hug

She sat on the floor and hugged her knees while watching the scary movie.

drop (down) on, drop to, fall on/to, go down on, sink to

She dropped to her knees when she saw her lost dog running toward her.

sit on

The little boy sat on his grandfather's knee while listening to bedtime stories.

slap

She slapped her knee when she heard the funny joke at dinner.

pat

She gently patted his knee to get his attention during the boring meeting.

buckle, give way

When he saw the accident, his knees buckled and he had to sit down.

above the ~, across your ~s

The water came up above my knees as I waded through the river.

at sb's ~

My grandmother taught me to cook traditional recipes at her knee when I was young.

below the ~

The doctor examined the swelling below the knee after her fall on the stairs.

between your ~s

When the plane hit turbulence, the flight attendant told everyone to put their heads between their knees.

in your ~

She felt a sharp pain in her knee when she landed awkwardly during the soccer match.

on one ~

She knelt down on one knee to tie her daughter's shoelaces.

on your ~

The child sat on her knees to pick flowers from the garden.

to your ~s

She fell to her knees and searched frantically through the grass for her lost ring.

bring sth to its knees

The economic crisis brought the small business to its knees in just a few months.

on bended knee

He refused to go on bended knee and apologize for something he didn't do.