obsess

[ uhb-ses ]
/ əbˈsɛs /

verb (used with object)

to dominate or preoccupy the thoughts, feelings, or desires of (a person); beset, trouble, or haunt persistently or abnormally: Suspicion obsessed him.

verb (used without object)

to think about something unceasingly or persistently; dwell obsessively upon something.

Origin of obsess

1495–1505; < Latin obsessus, past participle of obsidēre to occupy, frequent, besiege, equivalent to ob- ob- + -sid(ēre) combining form of sedēre to sit1

Related forms

ob·sess·ing·ly, adverbob·ses·sor, noun

Can be confused

abscess obsess
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for obsess

British Dictionary definitions for obsess

obsess

/ (əbˈsɛs) /

verb

(tr; when passive, foll by with or by) to preoccupy completely; haunt
(intr; usually foll by on or over) to worry neurotically or obsessively; brood

Word Origin for obsess

C16: from Latin obsessus besieged, past participle of obsidēre, from ob- in front of + sedēre to sit
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012