Questions & Answers about Onlar neden bu problemden bahsetmedi?
Why does the word for problem have the -den ending (problemden)?
In English, we say "talk about something", but in Turkish, the verb bahsetmek (to talk about / to mention) always requires the ablative case ending -den or -dan (which usually means "from"). So you are structurally saying they didn't talk "from" this problem.
What is the root of the verb bahsetmedi?
bahsetmek is a compound verb made from the noun bahis (topic/discussion) and the helper verb etmek (to do/make). When combined, the "i" in bahis drops out. The ending -medi adds the negative (-me) and the simple past tense (-di).
Since the subject is Onlar (they), why isn't the verb pluralized as bahsetmediler?
In Turkish, if the plural pronoun Onlar is explicitly used in the sentence, adding the plural ending -lar or -ler to the verb is optional for human subjects. Saying Onlar ... bahsetmedi is completely correct and sounds very natural.
Why is the question word neden placed after Onlar?
While English puts "why" at the very beginning, Turkish usually places question words closer to the verb or right before the specific part of the sentence they focus on. Placing neden after the subject Onlar is the standard and most natural word order here.