tarpaulin
noun(also North American English, informal tarp)
[countable, uncountable]a large sheet made of heavy waterproof material, used to cover things with and to keep rain off 柏油帆布；（防水）油布 The car was covered with a black tarpaulin. 那辆车用黑色的油布盖着。
Word Originearly 17th cent.: probably from tar + the noun pall + -ing.