Addict
/ˈæ.dɪkt/
noun
A person who is addicted, especially to a harmful drug
“He is an addict when it comes to chocolate cookies.”
An adherent or fan (of something)
Synonyms: adherent, aficionado, devotee, enthusiast, fan, habitue, junkie, slave
verb
To deliver (someone or something) following a judicial decision.
To devote (oneself) to a given activity, occupation, thing etc.
To bind (a person or thing) to the service of something.