As a Noun: 1. The quality you show when you have decided to do something and you will not let anything stop you. English = determination. 2. Something which someone cannot stop thinking or worrying about. English = obsession. As a Verb or Adjective: 1. To have a firm decision to do something and to not let anything stop you. English = (be) determined. 2. To be unable to stop thinking about something, to have your thoughts on one thing all the time. English = (be) obsessed (with something), (be) obsessive.