綱

プログレッシブ和英中辞典(第4版)

つな【綱】

&fRoman1;〔縄〕a rope

荷物に綱を掛ける
tie (up) a package with a rope

空き地の周りに綱を張った
They put up a rope around the vacant land.

警察が綱を張って人々を入らせない
The police have roped [cordoned] off the area to keep people out.

&fRoman2;〔寄りすがるもの〕

あなたの援助だけが頼みの綱です
Your aid is the only thing we have to depend on.

命の綱と頼む人を失う
lose the person 「on whom one has depended entirely [who has been one's lifeline]

綱を張る

〔相撲で横綱になること〕become a yokozuna [grand champion] in sumo

出典　小学館「プログレッシブ和英中辞典(第4版)」