Word/Phrase: earnest
Translation: sincero
Pronunciation: ˈsint͡seɾo
He is an earnest student - Él es un estudiante sincero
She made an earnest effort - Ella hizo un esfuerzo sincero
They had an earnest conversation - Tuvieron una conversación sincera
His earnestness is admirable - Su sinceridad es admirable
We need to be earnest in our intentions - Necesitamos ser sinceros en nuestras intenciones