to put it mildly

イディオム992/1,085

used to show that what you are talking about is much more extreme, etc. than your words suggest

1 本の映画に登場 · Something the Lord Made
To put it mildly. Helen, you can't operate on the heart.
クリップを保存
Something the Lord Made (2004)24:02
イディオム · 992 / 1,085
to put it mildly の意味と使い方 · 映画クリップ 2 本