This is the 15th most frequent Lithuanian word.
kai
"When."
In this sentence, 'kai' introduces a clause specifying a point in time in the past.
Kai aš buvau mažas, mėgdavau piešti.
When I was young, I liked to draw.
Here, 'kai' connects two clauses, indicating the time context of the second clause.
Aš supratau, kai tu paaiškinai problemą.
I understood when you explained the problem.
In this sentence, 'kai' introduces a temporal action that occurs under a certain condition, emphasizing simultaneity.