thorny

1. ADJ A thorny plant or tree is covered with thorns. 帶刺的

...thorny hawthorn trees. …帶刺的山楂樹。

2. ADJ If you describe a problem as thorny, you mean that it is very complicated and difficult to solve, and that people are often unwilling to discuss it. 棘手的

...the thorny issue of immigration policy. …移民政策這個棘手的問題。