plain and simple

IPA(Pronunciation)

Adverb

Clearly, without any doubt or complexity.

Japanese Meaning

明確で疑いの余地がなく、無駄な複雑さがない / 単純明快で、飾り気がなく率直である

To put it plain and simple, we need more time to finish the project.

端的に言えば、私たちはプロジェクトを終えるためにもっと時間が必要です。

Sense（1）

Clearly, without any doubt or complexity.

I don't care what he calls it. What he's doing is theft, plain and simple.