He is good at doing backflips.

This pesticide has a knockdown effect.

He likes to take a walk in the park at dusk.

She is always behaving like a tomboy.

She has a very tomboyish personality.

He is doing special exercises to strengthen his adductors.

He started exercises to strengthen his abductors.

He had difficulty walking due to an injury to his adductor minimus.

He injured his adductor longus.

He is doing special exercises to strengthen his adductor magnus.