プログレッシブ和英中辞典(第4版)の解説
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