1.C 刺，棘　sharp pointed growth on the stem of a plant
2.C U 荆棘　any of shrub or bush with prickles

　The dog had a thorn in its pad.　这只狗的爪垫上扎了一根刺。
　The thorns have caught our clothing.　荆棘挂住了我们的衣服。
　I was sitting on the thorns while waiting for the outcome.　等待结果时我如坐针毡。

［派生词］ thornless adj.无刺的‖thornlike adj.像刺一样的‖thorny adj.多刺的；棘手的；多困难的