n a sharp protuberance
n a dead tree that is still standing, usually in an undisturbed forest
n an opening made forcibly as by pulling apart
n an unforeseen obstacle
v catch on a snag
v get by acting quickly and smartly
v hew jaggedly
n. （尤指潜伏的）困难( snag的名词复数 ); 尖利的突出物; 根株; 被刮破或钩坏的裂口
v. （被尖锐物）挂住( snag的第三人称单数 ); 迅速抓到; 抢到; 抓住