adjective

colourless

colorless, uninteresting, dull, transparent

Water is a colourless liquid.

Water is a colorless liquid.

It was a rather colourless speech.

It was a rather colorless speech.

((a colorless sth.)) having no color Water is a colorless liquid.

Synonyms: transparent, clear, dull, drab; Antonyms: colorful, vibrant, bright

From 'color' + '-less' (meaning 'without'). Literally 'without color'.

Think of something having 'less color' until it has none at all. It becomes colorless.

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