l'effort

Tu dois faire un effort pour comprendre.

You have to make an effort to understand.

Cet effort lui a coûté beaucoup d'énergie.

That effort cost him a lot of energy.

Sans effort, on n'apprend pas une langue.

Without effort, you don't learn a language.

Elle a fait l'effort de venir me voir.

She made the effort to come and see me.

Ses efforts vont enfin payer.

Her efforts are finally going to pay off.