for better or worse; in good times and bad
A set phrase meaning 'whether things are good or bad', used to say that something applies regardless of circumstances. Often appears in formal or literary contexts.
For better or worse, family members always support each other.
Whether for good or ill, his decision affected those around him.
A classical Japanese set phrase combining 良き (good) and 悪しき (bad) with the particle につけ, an old conditional form meaning 'in the case of'. The exact historical derivation is uncertain, but it follows a pattern of contrasting pairs used to express 'regardless of circumstances'.