untie

verb

undo the ties of
のネクタイを外す
- They untied the prisoner
  彼らは囚人を自由にした
cause to become loose
緩くする
- undo the shoelace
  靴ひもをほどく
- untie the knot
  結び目を解く
- loosen the necktie
  ネクタイを緩める

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