Translation of "Heartedly" in Japanese

I support you whole-heartedly.

僕は君を全面的に支持する。

He devoted himself whole-heartedly to her.

彼は誠心誠意、彼女に尽くした。

- I support you whole-heartedly.
- You have my full support.

僕は君を全面的に支持する。

Doing something only half-heartedly is the worst thing you can do.

中途半端が一番悪いわよ！！

I would wake up in the morning, and I would meditate half-heartedly

朝起きて 心ここにあらずで 瞑想して 結局諦めます

- There's nothing worse than doing things by halves!!
- There is nothing worse than doing something in a half-hearted manner.
- The worst thing you can do is to only do something half seriously.
- Doing something only half-heartedly is the worst thing you can do.
- Leaving something unfinished is the worst thing you can do.

中途半端が一番悪いわよ！！