さておき

I don't know about O

《やや略式》(人・物・事)のことはさておき

not to mention O ＝without mentioning O

《略式》…はさておき.

▲Come to me (the) first thing on Monday morning. 何はさておき月曜日の朝一番にいらっしゃい / (all) joking apart ［aside］ 《略式》［文頭で］冗談はさておき / He subordinated his wishes to the children's good. 彼は何をさておいても子供の幸福をまず考えた.

* * *

さておき

I don't know about O

《やや略式》(人・物・事)のことはさておき

not to mention O ＝without mentioning O

《略式》…はさておき.

▲Come to me (the) first thing on Monday morning. 何はさておき月曜日の朝一番にいらっしゃい

(all) joking apart ［aside］ 《略式》［文頭で］冗談はさておき

He subordinated his wishes to the children's good. 彼は何をさておいても子供の幸福をまず考えた.