夋

酸 suān acid (chemistry: compound that ionizes to produce hydrogen ions, neutralizes bases, reacts with metals to produce salts and hydrogen gas)

俊 jùn handsome; good-looking (opposite of ugly) 唆 suo to instigate; to incite someone to do wrong 峻 jùn high and steep (of a mountain) 梭 suō shuttle (weaving tool on a loom that carries the weft thread through the warp, thick in the middle and pointed at both ends, typically made of hard wood; also called 梭子) 竣 jùn to complete; to finish (a task or project)