Without flare or lacking the quality of flaring; not producing or characterized by a sudden bright light or burst of flame.
From 'flare' plus the suffix '-less' (meaning without or lacking). The '-less' suffix creates antonyms and indicates the absence of a quality, as in 'hopeless' or 'tireless.'
The '-less' suffix is beautifully efficient—it transforms any noun into its opposite adjective, and we can instantly understand new words like 'flareless' even though we've probably never encountered it before.
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