IPA: //əˈdɪkʃən//
KK: /əˈdɪkʃən/
A strong and harmful need to regularly take a substance or engage in a behavior, often leading to negative effects on a person's life.
His addiction to video games affected his social life and studies.
Addiction is formed from "addicere" (meaning to devote or surrender) which is a combination of "ad-" (meaning to) and "dicere" (meaning to say or declare). The term originally referred to the act of devoting oneself to something, often with a connotation of surrendering control, which has evolved into the modern understanding of a compulsive dependence on a substance or behavior.
Think of 'devoting oneself to something' — 'ad-' means to, and 'dicere' means to declare. This helps you remember that addiction refers to a strong devotion or dependence on a substance or behavior.