Learn Turkish: Herkes bir gün ister istemez yaşlanacak. - Everyone will inevitably grow old one day.

It literally translates to "wants, doesn't want." It is formed by pairing the positive aorist (broad tense) ister with the negative aorist istemez of the verb istemek (to want). Used together, this fixed adverbial phrase means "whether one wants to or not," which perfectly captures the meaning of "inevitably."

Could I place ister istemez at the very beginning of the sentence?

Yes, you could say İster istemez herkes bir gün yaşlanacak. However, Turkish generally prefers to keep adverbs close to the verbs they modify. Placing it right before yaşlanacak is the most natural word order and emphasizes the inevitability of the action itself.

Why does Herkes (everyone) take the singular verb yaşlanacak instead of the plural yaşlanacaklar?

In Turkish, indefinite pronouns that refer to groups of people, like herkes (everyone) or kimse (nobody), are treated as grammatically singular. Because of this rule, the verb must remain in the third-person singular form without the plural suffix -lar.

How is the verb yaşlanacak constructed?