to believe; to believe in; to place trust in; to confide in; to have faith in
to believe implicitly; to believe firmly; to believe entirely
to believe in each other; to trust each other
自分の力を信じることが大切です。
Believing in yourself matters.
友達の話を信じて協力しています。
I believe my friend's story.
私は彼の言うことを心から信じていました。
I truly believed everything he said.