This is the 1753rd most frequent Russian word.
думала
"Thought" (feminine past tense of "думать").
The word "думала" is used to express the speaker's past assumption or belief about an event.
Я думала, что встреча начнётся в три часа.
I thought the meeting would start at three o'clock.
Here, "думала" signifies contemplation or reflection regarding her own future.
Она думала о своём будущем.
She was thinking about her future.
The term "думали" reflects the action of weighing or analyzing the content of a proposal.