最さい優ゆう先せん

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最優先する · noun or participle which takes 'suru'

Meanings

top priority; highest priority; maximum preference

Used when something is given the highest priority over all other matters. Often used in business, policy, and personal decision contexts.

〈事こと〉を最さい優ゆう先せんするto give top priority to something
この会かい社しゃは社しゃ員いんの安あん全ぜんを最さい優ゆう先せんする。
This company gives top priority to employee safety.
〈事こと〉を最さい優ゆう先せんにするto make something the top priority
顧こ客きゃく満まん足ぞくを最さい優ゆう先せんにしています。
We make customer satisfaction our top priority.
〈事こと〉が最さい優ゆう先せんだsomething is the top priority
今いまは健けん康こうが最さい優ゆう先せんだ。
Right now, health is the top priority.

優ゆう先せんN1
優先 means general 'priority' or 'preference', while 最優先 emphasizes that something ranks above all other priorities.
最さい重じゅう点てん
最重点 also means 'top priority' but stresses the most important focal point of a plan, whereas 最優先 stresses ordering above competing tasks.
第だい一いちN2
第一 casually means 'number one' or 'most important', while 最優先 is the more formal term used for explicit prioritization decisions.
何なによりN2
最優先 is a formal noun for 'top priority' used in business or policy contexts, whereas 何より is a common, everyday way to express personal priority.

後あと回まわしN2
後回し means putting something off until later, the opposite of treating it as 最優先 (top priority).
二にの次つぎN1
最優先 means the top priority, the direct opposite of 二の次, which means something of secondary importance.

Compound of 最 (sai, 'most') + 優先 (yūsen, 'priority').