snag
名词 snag:
a sharp protuberance
a dead tree that is still standing, usually in an undisturbed forest
an opening made forcibly as by pulling apart
同义词:rip, rent, split, tear
an unforeseen obstacle
同义词:hang-up, hitch, rub
动词 snag:
catch on a snag
get by acting quickly and smartly
hew jaggedly