no matter how much time passes
Used to express that something remains unchanged or does not happen despite a long time passing. Often followed by a negative or continuing state.
No matter how much time passes, I don't get a reply.
No matter how much time passes, he remains a child.
Standard kanji-kana mixed spelling.
Full kanji spelling; rarely used in modern writing.
Combination of いつまで (until when) + 経っても (even if time passes), from the verb 経つ (to pass, of time).