obsessively
UK: əbˈsɛsɪvli | US: əbˈsɛsɪvli
adv. in a manner characterized by excessive preoccupation or fixation
adv. to an extreme or uncontrollable degree
The word "obsessively" derives from the Latin obsess- (past participle stem of obsidēre, meaning "to besiege" or "haunt"), combining ob- (against) + sedēre (to sit). Over time, "obsess" evolved in English to mean "to preoccupy the mind persistently." The suffix -ive turns it into an adjective ("obsessive"), and -ly further converts it into an adverb, describing actions done with compulsive intensity.
She checked her phone obsessively, fearing she might miss an important message.
He cleaned his workspace obsessively, leaving no trace of dust.
The artist worked obsessively on the painting, refusing to rest until it was perfect.
Some collectors obsessively track down every rare edition of their favorite books.
His obsessively detailed notes revealed his passion for the subject.