Obsessor

[uh b-ses] /əbˈsɛs/

verb (used with object)
1.
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)
2.
to think about something unceasingly or persistently; dwell upon something.
/əbˈsɛs/
verb
1.
(transitive; when passive, foll by with or by) to preoccupy completely; haunt
2.
(intransitive; usually foll by on or over) to worry neurotically or obsessively; brood
v.

c.1500, “to besiege,” from Latin obsessus, past participle of obsidere “watch closely; besiege, occupy; stay, remain, abide” literally “sit opposite to,” from ob “against” (see ob-) + sedere “sit” (see sedentary). Of evil spirits, “to haunt,” from 1530s. Psychological sense is 20c. Related: Obsessed; obsessing.

Read Also:

Obsidian
[uh b-sid-ee-uh n] /əbˈsɪd i ən/ noun 1. a volcanic glass similar in composition to granite, usually dark but transparent in thin pieces, and having a good conchoidal fracture. /ɒbˈsɪdɪən/ noun 1. a dark volcanic glass formed by very rapid solidification of lava Also called Iceland agate n. “dark, hard volcanic rock,” 1650s, from Latin […]
Obsidional-coin
[uh b-sid-ee-uh-nl] /əbˈsɪd i ə nl/ noun 1. .
Obsolesce
[ob-suh-les] /ˌɒb səˈlɛs/ verb (used without object), obsolesced, obsolescing. 1. to be or become . /ˌɒbsəˈlɛs/ verb 1. (intransitive) to become obsolete v. 1801, from Latin obsolescere “to grow old, wear out, lose value, become obsolete,” inchoative of obsolere “fall into disuse” (see obsolete). Related: Obsolesced; obsolescing.

Obsolescence
[ob-suh-les-uh ns] /ˌɒb səˈlɛs əns/ noun 1. the state, process, or condition of being or becoming obsolete. n. 1809; see obsolescent + -ence. Phrase Planned obsolescence coined 1932, revived as a disparaging term 1950s. obsolescence [(ob-suh-les-uhns)] A decline in the value of equipment or of a product brought about by an introduction of new technology […]
Obsolescent
[ob-suh-les-uh nt] /ˌɒb səˈlɛs ənt/ adjective 1. becoming obsolete; passing out of use, as a word: an obsolescent term. 2. becoming outdated or outmoded, as machinery or weapons. 3. Biology. gradually disappearing or imperfectly developed, as vestigial organs. /ˌɒbsəˈlɛsənt/ adjective 1. becoming obsolete or out of date adj. 1755, from Latin obsolescentum (nominative obsolescens), present […]