very busy with sth; very interested or involved in sth :
He's too bound up in his work to have much time for his children.
very busy with sth; very interested or involved in sth :
He's too bound up in his work to have much time for his children.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005