Breakdown of ¡No abandones tu propósito!
no
no, not
tu
your
abandonar
to abandon
el propósito
the resolution / the purpose
Questions & Answers about ¡No abandones tu propósito!
Why is it abandones with an "-es" ending when abandonar is an "-ar" verb?
In Spanish, negative informal commands (telling someone tú not to do something) use the present subjunctive form. For an "-ar" verb like abandonar, you swap the normal "-as" ending for "-es", which gives us no abandones.
Since this lesson covers infinitives vs. the subjunctive, how would I say "I don't want to abandon my resolution"?
Because there is no change of subject (you are talking about your own desire and your own action), you use the infinitive instead of the subjunctive: No quiero abandonar mi propósito. If you wanted someone else to do it, you would use the subjunctive: Quiero que no abandones tu propósito.
Is propósito a false friend for the English word "purpose"?
Not exactly, they are actually closely related! While it is translated here as "resolution" (as in a personal goal or a New Year's resolution), propósito very commonly means "purpose" or "intent" in other contexts.
How would this sentence change if I were speaking to a group of people?
In Latin America, you use ustedes for all groups. The negative command form for ustedes ends in "-en" for "-ar" verbs. You would also need to change the possessive adjective tu to su. The sentence becomes: ¡No abandonen su propósito!