先立って|さきだってsakidatte

1. expressionprior to; before; in advance ofusu. as 〜に先立って
2. noun, adverbthe other day; some time ago; recently

• Synonym前もってまえもってNeutralCovers doing something in advance, as in 「前もって連絡する」. Common in speech, and the focus is on preparing or arranging things ahead of time.
• Synonym先にさきにNeutralA broad, everyday word for 'before' or 'first', as in 「先に行く」. More colloquial than 「先立って」 and usable in far wider situations.
• SynonymあらかじめNeutralAlso means 'in advance', as in 「あらかじめご了承ください」 or 「あらかじめ準備する」. Typical of written/formal prose such as notices, rather than casual talk.
• RelatedかねてNeutralRefers to something already true for a long time, as in 「かねてからの希望」. It stresses a long-standing state or wish rather than an action taken just before an event.
• Related以前いぜんNeutralPoints to a time in the past, or to the period before something, as in 「開会以前に」. Unlike 「先立って」, it does not stress going ahead to do something first.
• Relatedお先におさきにNeutralUsed for going ahead of others, as in 「お先に失礼します」. Mostly a polite set phrase for taking one's leave, not a general way to say 'prior to'.
• Related早めにはやめにNeutralMeans doing something a little earlier than planned or than usual, as in 「早めに出る」. The nuance is 'a bit early', not the formal 'prior to' of 「先立って」.
• AntonymのちにNeutralThe opposite of 「先立って」: it means later on or after a while, as in 「後に判明した」.

Formal 'prior to' takes 「〜に先立って」, as in 「開会に先立ち挨拶する」; for advance preparation in speech use 「前もって」, in written notices 「あらかじめ」. 「かねて」 covers long-standing cases, 「先に」 everyday 'before/first', 「お先に」 polite leave-taking, 「早めに」 a bit early, 「後に」 the opposite.

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

1. 前まえもって。あらかじめ。
2. 先日せんじつ。過日かじつ。さきごろ。