Typically treated as non-gradable; comparative and superlative forms are not standard.
He felt obliged to help his friend.
Он чувствовал себя обязанным помочь своему другу.
She was obliged to attend the meeting.
Она была вынуждена присутствовать на встрече.
Used predicatively or attributively (usually after a linking verb) meaning ‘grateful’ or ‘compelled’.