nail down #3

　エリザベス女王のスピーチが数日間の延期となりました。最大野党の労働党は，女王の施政演説が延期となったのは選挙で実質的に敗北した与党の混乱を表していると述べました。
　記事の中で気になった表現は"nail down"です。『Wisdom英和辞典第三版』(三省堂)には「<原因など> を明らかにする, 突き止める」などという意味がありました。与党の保守党は，民主統一党に対して連立を組むことを呼びかけております。(Ume)

Queen's Speech delayed as DUP talks continue

BBC assistant political editor Norman Smith said the decision to delay it revealed an "ambiguity" about what would go in it - with several manifesto pledges expected to be watered down or dropped - but also the need for the Tories to "nail down" DUP support.
A defeat for its Queen's Speech would be tantamount to a vote of no confidence in the new minority government, he said.
One of the reasons for the delay is also believed to be because the speech has to be written on goat's skin parchment paper, which takes a few days to dry - and the Tory negotiations with the DUP mean it cannot be ready in time.

http://www.bbc.com/news/uk-politics-40243782　
nail down #2 - 田邉祐司ゼミ 常時英心：言葉の森から
nail down - 田邉祐司ゼミ 常時英心：言葉の森から