n. a sharp protuberancen. a dead tree that is still standing, usually in an undisturbed forestv. catch on a snagv. get by acting quickly and smartly
n. (尖利的)突出物, (衣服等的)戳破处, 断牙, 意外障碍vt. 造成阻碍, 抓住机会, 抢到, 清除障碍物