Used to indicate that a conclusion or situation is inevitable regardless of circumstances. Often appears at the beginning of a sentence or clause.
どのみち、明日まで待たなければならない。
Anyway, we have to wait until tomorrow.
どのみち彼は来ないだろう。
In any case, he probably won't come.
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.
Standard kanji spelling, though the word is usually written in kana.
Kana spelling is the most common and recommended form.
Rarely used kanji form; learners should avoid this spelling.
Compound of どの (which) + 道 (road, way), literally 'whichever way', which developed into the adverbial meaning 'in any case'.