Meanings
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1
verb
To think or worry about someone or something all the time.
She obsesses over every tiny mistake she makes.
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2
verb
To fill someone's thoughts completely.
Thoughts of the upcoming exam obsessed him for weeks.
Thesaurus
Etymology
From Latin obsessus, perfect passive participle of obsideō (“sit on or in, remain, besiege”), from ob- (“before”) + sedeō (“to sit”); see sit, session, etc.; compare assess, possess.
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