上瘾(shàng yǐn) - to become addicted, to be addicted in Mandarin

上瘾 (shàngyǐn) means "to become addicted" or "to be addicted". 上 (shàng) here works like "to catch, to develop" rather than its usual "up, onto", and 瘾 (yǐn) means "addiction, craving" - the character carries the sickness radical 疒, a hint that it originally described a compulsive illness.

The pattern to learn is 对...上瘾 (duì...shàngyǐn), "addicted to...": 他对游戏上瘾了 (tā duì yóuxì shàngyǐn le), "he's become addicted to games", puts the thing someone is hooked on after 对 (duì) rather than treating 上瘾 (shàngyǐn) as a verb that takes a direct object.

It covers substances as readily as habits: smoking, sugar, phones and shopping are all common things people are described as 上瘾 (shàngyǐn) to, which is why it pairs naturally with 戒 (jiè), "to quit" - 戒烟 (jièyān), "quit smoking", is the cure for having 上瘾 (shàngyǐn) to cigarettes in the first place.