This is the 7659th most frequent Russian word.
з
In Russian, "з" is a single letter, not a standalone word. It represents the Cyrillic letter "z."
The preposition 'с' (pronounced 's' here) means 'with' and indicates companionship or accompaniment.
Я встретился с другом.
I met with a friend.
Here, 'за' represents the activity or accompaniment of having tea.
Пирог вишнёвый вкусный за чаем.
The cherry pie is tasty with tea.
The word 'за' in this sentence means 'around' or 'behind' and refers to a location past something else.