verb see: ob- Date: 1531 transitive verb to haunt or excessively preoccupy the mind of , intransitive verb to engage in ~ive thinking ; become ~ed with an idea
OBSESS
Meaning of OBSESS in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012