hoarder
🇺🇸
/ˈhɔːrdər/
🇬🇧
/ˈhɔːdə(r)/
someone who keeps a lot of things they don't need
My neighbor is a hoarder; his house is filled with old newspapers and boxes.
私の隣人は物を溜め込む人で、彼の家は古い新聞と箱でいっぱいです。