名詞 osier:

1. flexible twig of a willow tree
2. any of various willows having pliable twigs used in basketry and furniture

1. Osier is used to make baskets.
   柳條常用來編筐。

o.sier

n.（名詞）

Any of several willows having long rodlike twigs used in basketry, especially the EurasianSalix viminalis and S. purpurea.
柳樹：一種長有可用于編籃的鞭狀長細枝的柳樹，尤指歐亞大陸植物青剛柳 和 紅皮柳
A twig of one of these trees.
柳枝：上述樹木的細枝
Any of various similar or related trees.
柳樹：與之相似或有親緣關系的任一種樹

來源：
Middle English
中古英語
from Old English oser
源自 古英語 oser
Old French osier
古法語 osier
both from Medieval Latin osera, osiera
都源自 中世紀拉丁語 osera, osiera