保留|ほりゅうhoryuu[0]heiban (flat)

1. noun, suru verb, transitive verbreservation; putting on hold; deferment; withholding
   その件けんは保留ほりゅうにしておこう。↗

   Let's put that on hold.

• Synonym留保りゅうほWrittenWritten/formal prose. Reserving a right without exercising it, common in law and diplomacy as 「留保条件」; 「保留」 is the everyday word, also for not deciding yet.
• Synonym延期えんきNeutralNeutral. Pushing a set date back to a later one; 「保留」 means not deciding or dealing with something yet, without necessarily fixing a new date.
• Synonym先送りさきおくりNeutralNeutral. Putting off a judgment or task that should be handled now, often with a negative nuance of dodging it that 「保留」 does not have.
• Synonym猶予ゆうよWrittenWritten/formal prose. Granting extra time on a deadline, as in 「執行猶予」 or 「猶予期間」; the focus is on a buffer period, not on withholding a decision.
• Related持ち越すもちこすNeutralNeutral. Carrying an unfinished matter over to the next stage, as in 「結論を来週に持ち越す」; 「保留」 just leaves it on hold.
• Related遅らせるおくらせるNeutralNeutral. Making something later or slower, as in 「出発を遅らせる」; the emphasis is on the time slipping back, not on holding a decision.
• Related繰り延べるくりのべるWrittenWritten/formal prose. Shifting a schedule to a later date; the focus is on moving the date itself, while 「保留」 puts a matter on hold whether or not a new date is set.
• Related繰り下げるくりさげるNeutralNeutral. Moving a time or order back, as in 「開始時間を繰り下げる」; it shifts a set time later rather than putting a matter on hold.
• Related控えるひかえるNeutralNeutral. Refraining from doing something for now, as in 「発言を控える」; also to jot down or stand by — the core is restraint, not deferring a decision.
• Related待機たいきNeutralNeutral. Standing by ready for orders or an opportunity, as in 「自宅待機」; it is about waiting prepared, not about deferring a decision.
• Related待つまつNeutralNeutral. The most common word for waiting; 「保留」 is what you do when you actively set a matter aside yourself.
• Related順延じゅんえんNeutralNeutral. Postponing to the next slot in sequence, typically for weather, as in 「雨天順延」; 「保留」 does not imply a set order of dates.
• RelatedリザーブNeutralNeutral. Loanword for booking or reserving in advance, as in 「席をリザーブする」; it secures something for later use, unlike 「保留」's holding off on a decision.
• Related日延べひのべNeutralNeutral. Pushing a scheduled date back; the tone is somewhat old-fashioned, and 「延期」 is the usual word today.
• Related遷延せんえんWrittenWritten/formal prose. A matter dragging on and becoming prolonged; mostly in writing, often medical as in 「遷延性意識障害」.
• Related取っておくとっておくNeutralNeutral. Setting something aside to use later; the focus is saving or keeping things, not holding off on a decision.
• Related取り置くとりおくNeutralNeutral. Setting an item apart and keeping it, e.g. a shop holding goods for a customer; it is about objects, not deferred decisions.
• Antonym即決そっけつNeutralNeutral. Deciding on the spot; the direct opposite of 「保留」, which leaves a decision unmade.
• Antonym実行じっこうNeutralNeutral. Carrying a plan into action; the opposite of 「保留」's sense of putting execution on hold.

Use 「保留」 when you hold off on a decision or set a matter aside for now. When the date itself changes, say 「延期」; for pushing a matter off to later, 「先送り」 or 「持ち越す」. 「即決」 is the opposite — deciding on the spot.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. そのままの状態じょうたいで留とめておくこと。
2. その場ばで決定けってい・発表はっぴょうせず延のばすこと。