clean意思是“使洁净”、“把...去垢”(to make clean by washing,dusting,sweeping or brushing)。如:to clean a dress,room,hand,shoe,watch等。
cleanse意思是“清洗干净”,“使...纯洁”(to make thoroughly clean or make pure)。为此,cleanse含有“彻底洗清”之意味,语义比clean强得多。clean和cleanse的另一区别是前者为一般用语;后者是正式的(formal)或古旧的用语,有时它还能用于比喻意义,例如to cleanse one's soul洗涤心灵;to cleanse the heart of sin 洗心革面;ethnic cleansing 种族清洗/灭绝。