To declutter is to make a place tidier by taking out the extra things — the stuff you do not use, do not love, and do not need. Drawers, wardrobes, kitchens, computer desktops, even a calendar: if it feels crowded with objects or tasks, people now say declutter. It is a fairly new everyday verb, popular with lifestyle writing and with anyone trying to live with less. It is friendly and practical, not a government word and not very formal. You can declutter a room, a shelf, or your life, though the last one is a stretch: it still pictures “too many things,” even when the things are habits or apps. There is also a noun use, a declutter, meaning a session of doing this. The opposite feeling is clutter: a mess of things piled up. Declutter is simply taking that pile down. It does not mean decorate, and it does not mean throw everything away in a rage; the idea is to choose, remove, and leave space.

清除雜物、斷捨離（台灣常直接說斷捨離）