expression
in other words; that is to say; to put it another way
A formal or written expression used to rephrase or clarify a preceding statement. Often used in explanations, essays, or speeches.
彼は非常に勤勉だ。換言すれば、仕事の虫だ。
He is extremely diligent. In other words, he's a workaholic.
この計画は現実的ではない。換言すれば、実行不可能だ。
This plan is not realistic. That is to say, it's unfeasible.