IPA: /rɪˈlæpsər/
KK: /rɪˈlæpsər/
A person who returns to a previous condition, especially after a period of improvement, often used in the context of addiction or illness.
After several months of sobriety, he became a relapser and struggled with his addiction again.
Relapser → It is formed from "re-" (meaning again) and "labi" (meaning to slip or fall). The word "relapser" refers to someone who slips back into a previous state, particularly in the context of recovering from addiction or illness.
Think of someone who 'slips back' ('labi') into a previous condition 'again' ('re-') — that's why a relapser is someone who returns to a former state.