rub-, rubi- (Latin: the color red).erubescence: 
erubescent: 
rubedinous: 
rubefacient: 
rubefaction: 
rubella: 
rubeola: 
ruberal: 
rubescence: 
rubicund: 
rubicundity: 
rubify: 
rubiginous: 
rubigo: 
rubineous: 
rubric: 
rubricate: 
rubrication: 
ruby: 
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