1. 
   Obumbrate
   Ob·um'brate transitive verb [ Latin obumbratus , past participle of obumbrare to overshadow, cloud; ob + umbrare to shade.] To shade; to darken; to cloud. [ R.] Howell.
   Found op http://www.encyclo.co.uk/webster/O/7
   
   
2. 
   Obumbrate
   • (v. t.) To shade; to darken; to cloud.
   Found op http://thinkexist.com/dictionary/meaning/obumbrate/
   
   
3. 
   obumbrate
   obumbrate 1. With some structure overhanging the parts so as partially to conceal them. 2. To shade; to darken; to cloud.
   Found op http://www.wordinfo.info/words/index/info/view_unit/2224/
   
   

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