γιατί

Why don't you speak more slowly?

This statement explains why I want to study in Greece and how I will use my Greek at work.

Why do you have so many books on the table?

Why are you speaking to me irritably?

I wonder why the meeting is taking so long, since we’re all here on time.

I wonder why the dish rack is still full, since I washed the dishes an hour ago.

The manager’s explanation was short and clear, but I wonder why he suddenly changed the schedule.