noun which may take the genitive case particle 'no', noun
Refers to something kept in reserve for a special occasion or need; often used as a noun modifier with の.
とっておきのワインを開けるのは今夜だ。
Tonight is the night to open the special wine I've been saving.
彼はとっておきの資金を旅行
He used his reserve funds for the trip.
noun which may take the genitive case particle 'no', noun
Describes something personally valued and kept carefully, not just set aside; often implies emotional attachment.
祖母からもらったとっておきの指輪をなくしてしまった。
I lost the treasured ring my grandmother gave me.
これは私のとっておきのレシピです。
This is my prized recipe.
noun which may take the genitive case particle 'no', noun
ace up one's sleeve; trump card; secret weapon
Figurative use for a hidden advantage or special resource kept for a decisive moment; often in competitive contexts.
交渉では、最後にとっておきの条件を出すつもりだ。
In the negotiation, I plan to bring out my trump card at the end.
彼はいつもとっておきのネタを持っている。
He always has a secret weapon up his sleeve.
予備 is a more formal, general term for 'reserve' or 'spare', while とっておき implies something specially saved for a particular purpose or occasion.
大切 is a broad adjective meaning 'important' or 'precious'; とっておき specifically refers to something set aside and treasured, often with a nuance of being kept for a special moment.
Derived from the verb 取って置く (とっておく), meaning 'to put aside and keep'. The noun form とっておき comes from the continuative form of 取って置く, literally 'setting aside'.