If you say that someone or something is ~, you mean that they are absolutely essential and other people or things cannot function without them.
She was becoming ~ to him.
= essential
? dispensable
ADJ: oft ADJ to n
If you say that someone or something is ~, you mean that they are absolutely essential and other people or things cannot function without them.
She was becoming ~ to him.
= essential
? dispensable
ADJ: oft ADJ to n
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012