Having no taste or flavor; bland and uninteresting to eat.
From 'flavor' (from Old French 'flavour', possibly from Latin 'flatus' meaning 'blowing' or 'breath') plus the suffix '-less' meaning 'without'. The '-less' suffix comes from Old English and means the absence of a quality.
Your taste buds detect five basic flavors through different receptors, so something truly 'flavorless' isn't actually hitting those receptors—which is why hospital food gets this reputation, since cooking methods often destroy flavor compounds!
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