How to Say "earnest effort" in Spanish
The Spanish word for “earnest effort” is “empeño” — B1 level. This is a very common word in everyday Spanish.

Examples
Ella puso mucho empeño en aprender español.
She put a lot of effort into learning Spanish.
Logró su objetivo gracias a su empeño constante.
He achieved his goal thanks to his constant determination.
Admiro el empeño con el que trabajas todos los días.
I admire the dedication with which you work every day.
Using the connector 'en'
When you have determination to do something, always use 'en' followed by an action: 'empeño en mejorar' (determination in improving).
Common Verb Pairing
This noun is almost always used with the verb 'poner' (to put). To say someone is working hard, say they 'ponen empeño'.
The 'Employment' Trap
Mistake: “Using 'empeño' to mean a job or career.”
Correction: Use 'empleo' for a job. 'Empeño' is about the *spirit* or *effort* you put in, not the job itself.
Related Translations
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