词根：nebul = cloud （云）

nebula 星云状的

nebulous 星云的；朦胧的

词根词缀：nebula-, nebul-

【来源及含义】Latin: mist, fog, cloud, smoke

【相关词根词缀】 Inter-related cross references, directly or indirectly, involving word units dealing with "smoke, smoking": atmido-; capno; Capnomania & Fumimania, Pt. 1; Capnophobia & Fumiphobia, Pt. 1; fumi-; typho-.

【同源单词】circumnebulous, nebula, nebulaphobia, nebulate, nebulated, nebule