こしか腰掛koshikaけるkeruこしkoshiかけるkakeru
1.

To lower one's body onto a chair, bench, or elevated surface in order to rest, typically involving placing weight on one's hips or lower back.

2.

To take a brief pause by sitting on a piece of furniture or platform, often to relax or alleviate fatigue.

3.

To adopt a seated position temporarily, usually in a casual or informal context, such as resting on the veranda or a similar spot.

Example:

彼女は腰掛けて足を組んだ。