also: おそかれはやかれ
expression, adverb
A set phrase meaning that something will inevitably happen at some point in the future, though the exact timing is uncertain.
See also: 遅かれ早かれ
早かれ遅かれ、真実は明らかになるだろう。
Sooner or later, the truth will come to light.
努力を続ければ、早かれ遅かれ結果は出る。
If you keep working hard, sooner or later you'll see results.
Same meaning as 早かれ遅かれ, just with the words in reverse order. Both are used, but 早かれ遅かれ is slightly more common.
A set phrase composed of the adjectives 早い (early) and 遅い (late) in the 〜かれ form, an old adverbial form meaning 'whether it be early or late'. The construction is a classical Japanese pattern that survives in modern fixed expressions.