質問: what is the difference between ほそい and うすい ? what is the difference between ほそい and うすい ?
回答: ほそい is mainly used for columnar objects(trees, pencils, pipe etc.) or things shaped like string. for example, a dictionary says about 'string' "(rope より細く thread より太い)" 細い⇔太い 薄い⇔厚い(あつ-い) for paper, books, fabric etc. 薄い⇔濃い (こ-い)for colours(tint), seasoning etc. 色の濃淡 shades of colors