散漫さんまん Common I-adj Noun English jmdict 1 adjectival nouns or quasi-adjectives (keiyodoshi)noun (common) (futsuumeishi) vague;desultory;distracted;loose;half-hearted;diffuse;scattered 寝不足だと注意が散漫になりがちです。 When you lack sleep, you are apt to be careless.