anyhow; in any case; either way
Used to introduce a conclusion or decision that holds regardless of the circumstances; similar to 'anyway' or 'at any rate'.
In any case, we have to decide by tomorrow.
Either way, the result won't change.
Either way, we should listen to his opinion.
In any case, we have to decide by tomorrow.
いずれにせよ is a slightly more formal, written variant of いずれにしても with the same meaning of 'in any case'.
どのみち stresses that an outcome is unavoidable no matter what path is taken, whereas いずれにしても simply notes that a conclusion is the same regardless of the situation.
いずれにしても stresses that the conclusion holds regardless of various possibilities, whereas ともあれ simply sets aside what was just said to move on to the main point.
Rare kanji spelling; learners should use the kana form.
Archaic kanji spelling; not used in modern Japanese.
Derived from いずれ (which, whichever) + にしても (even if it is). The kanji 何れ is the standard but rare spelling for いずれ; 孰れ is an archaic variant.