noun, noun which may take the genitive case particle 'no'
Something kept in reserve for future use, such as spare parts, backup funds, or reserve troops.
予備のバッテリーを持っていく。
I'll bring a spare battery.
予備費はほとんど残っていない。
There is almost no reserve fund left.
noun, noun which may take the genitive case particle 'no'
Used for preparatory actions, preliminary steps, or things done in advance. Often appears in compounds like 予備知識 (prior knowledge) or 予備調査 (preliminary investigation).
予備知識がなくても楽しめる。
You can enjoy it even without prior knowledge.
予備調査の結果を報告する。
I will report the results of the preliminary investigation.
From Middle Chinese-derived elements 予 (beforehand) and 備 (prepare/equip). The older form 預備 uses 預 (deposit/entrust) but is now obsolete.