IPA(key): [ko̞ko̞ɾo̞jɯ̟kɯ̟ ma̠de̞] 心(こころ)行(ゆ)く<span class="searchmatch">まで</span> • (kokoroyuku made) to one's heart's content...
From <span class="searchmatch">心行く</span> (kokoroyuku, “be completely satisfied”) + 迄 (made, “until”). 心(こころ)行(ゆ)く迄(<span class="searchmatch">まで</span>) • (kokoroyuku made) to the heart's content...