nail one's colours to the mast

动词 v.

英文释义

动词 v.
  1. To clearly show one's support for a side or opinion in a dispute, often indicating an intention to defend that side to the end.
    — Stood for his country’s glory fast, And nail’d her colours to the mast!

词源

From the naval military practice of displaying one's colours (signal flags or insignia) from the mast of a ship during battle to show loyalty. To surrender, one would strike one's colours, i.e. take down one's flag. If a ship nailed its colours to the mast, it would fight to the death and not surrender.
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