1 Addict 是動詞。Addict to something 對……上癮，對……欲罷不能。
常常這樣用，be addicted to sth./sb.
她對唱卡拉OK上癮。
She's addicted to Karoke.
他總是愛爭論，很煩人。
He's addicted to arguing with people, very annoying.
2 Addictive，容易引起上癮的。
比如 這種藥容易上癮,小心吃藥別過量。this medicine is addictive. Watch outh the dose when you take it.
Power is addictive. 權利容易讓人上癮。