Meaning

noun someone who is so ardently devoted to something that it resembles an addiction

noun someone who is physiologically dependent on a substance; abrupt deprivation of the substance produces withdrawal symptoms

verb to cause (someone or oneself) to become dependent (on something, especially a narcotic drug)

originBorrowed from Latin addictus, past participle of addīcō (“deliver; devote; surrender”), from ad- (“to, towards, at”) + dīcō (“say; declare”)

Etymology from Wiktionary, CC BY-SA 3.0