Shirabe
English jmdict
1
adjectival nouns or quasi-adjectives (keiyodoshi)noun (common) (futsuumeishi) dull;slow;sluggish;inactive;inanimate;quiet;lethargic
寝ている間は、体の機能は不活発になり、体温は下がる。
While you are asleep, the bodily functions slow down and body temperature falls.
Other forms 不活溌 【ふかっぱつ】