Learn Farsi: پیش از این، در این روتین به چین و چروک توجه نشده بود. - Prior to this, wrinkles had not been paid attention to in this routine.

This is how impersonal passives work with prepositional verbs. The active verb is به چیزی توجه کردن (to pay attention to something). In the passive, the preposition به stays glued to the logical object (چین و چروک). Because the object is blocked by the preposition, it cannot become the grammatical subject. The sentence therefore has no subject, so the verb simply defaults to the 3rd-person singular.

What tense is توجه نشده بود?

This is the negative past perfect (pluperfect) passive. It is formed with the negative past participle of the passive auxiliary (نشده, meaning "not become") plus the simple past of بودن (بود). We use it here to express that attention "had not been paid" prior to a specific reference point in the past.

What is the literal breakdown of چین و چروک?

It is a compound noun made of two synonyms: چین (fold or crease) and چروک (wrinkle), linked by the conjunction و. Farsi frequently pairs synonyms like this to express a broader, general concept. It is the most natural, idiomatic way to say "wrinkles" regarding skin or clothing.

Is روتین just the English word "routine"?

Yes, روتین is a modern loanword. It is used exactly like its English counterpart, especially when discussing daily habits, schedules, or skincare regimens—which perfectly explains why we are talking about treating wrinkles in this sentence!