Translation of "大変だよ" in English

大変だよ

Really, really hard.

後始末が大変だよ。

Afterwards there will be hell to pay.

食べ物にアレルギーがあると、外食の時大変だよね。

- When you have allergies, eating at a restaurant is a huge pain.
- When you have food allergies, eating out is difficult, isn't it?

- この山は登るのが困難だよ。
- この山は登るのが大変だよ。

This mountain is difficult to climb.