obsessive
adjective/ɔbsɨsivu/medium
ob·ses·si·vo
Definition
Relating to or characterized by obsession; showing persistent, intrusive thoughts or behaviors.
He has an obsessive need for order.
Her interest in the subject bordered on obsessive.
Common collocations
obsessive thoughtsobsessive behaviorobsessive-compulsive disorder (OCD)obsessive love
Etymology
Do latim 'obsessivus', de 'obsidere' (assediar, sitiar).