This is the 32nd most frequent Armenian word.
ինչ
"Ինչ" means "what" in English.
The word 'ինչ' is used as an interrogative pronoun to ask a question about an action or object.
Ինչ ես անում հիմա։
What are you doing now?
The word 'ինչու' is derived from 'ինչ' and is used to ask questions concerning reasons or causes.
Ես չեմ հասկանա, թե ինչու դա արեց։
I don't understand why they did that.
Here, 'ինչ' is acting as a content interrogative to introduce the nature of a subject in indirect speech.