Somewhat blue in color; having a slight blue tint or hue rather than being a pure blue.
From 'blue' + '-ish' (Middle English suffix meaning 'somewhat' or 'having the quality of'), a productive suffix added to color words to indicate approximation.
The '-ish' suffix is brilliantly useful in English—it lets us talk about colors, emotions, and qualities in approximate terms, which is how we actually perceive and describe things in real life.
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