1. Important derivatives are: coast, cutlet, accost
重要派生词为： coast， cutlet， accost

2. Bone.
骨头.

3. Probably related to ost- . coast , costa , costard , costrel , cuesta , cutlet ; accost , intercostal , sternocostal , from Latin costa , rib, side.
可能与ost-. coast 有关, costa , costard , costrel , cuesta , cutlet ; accost , intercostal , sternocostal , 源自 拉丁语 costa , 肋骨, 侧面.

kost的词源：

4. Pokorny kost- 616.
波科尔尼kost- 616.