colourless

a.平庸的

coloratura, colored, colorful, colorless, colossal, colossus, colour, colour (US color), colour code, colour scheme, colour-bar, colour-blind, colour-blindness, colour-coded, colour-fast, coloured, coloured (US colored), colourful, colourful (US colorful), colouring, colourless (US colorless), colt, colter, coltish, columbine, Columbus, column, columnist, coma, comatose, comb, combat, combatant, combative, combatively, combativeness, combination, combination lock, combine, combine with,