This is the 16281st most frequent Turkish word.
yapmadılar
"They did not do/make."
In this sentence, 'yapmadılar' is the verb 'yapmak' (to do/make) in negation ('yapma-') and past tense third person plural (-dılar), indicating the subject 'they' in the past.
Bugün ödevlerini yapmadılar.
They didn't do their homework today.
Here, 'yapmadılar' shows that 'they' refrained or failed from completing the task, emphasizing a repeated or sequence of non-actions.
Maalesef bu kadar işi bugün de yapmadılar.
Unfortunately, they didn't do this much work today either.
In this usage, 'yapmadılar' refers to the absence of action undertaken, specifically linked to preparation or arrangements.