词根词缀：umbra-, umbro-, umbr-, umbel-

【来源及含义】Latin: shade, shadow

【相关词根词缀】Other related "dark; shadow, shade; black" units: lygo-; melan-; nigri-; nocti-; nycti-; scoto-; skio-.

【同源单词】abumbral, adumbral, adumbrant, adumbrate, adumbration, adumbrellar