thorny

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

...thorny hawthorn trees. …带刺的山楂树。

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. …移民政策这个棘手的问题。