A rare or archaic form meaning without weakness or not feeble (the opposite of feeble).
Constructed from 'feeble' with the suffix '-less' (meaning without), creating a negation that was occasionally used in Middle English and Early Modern English but is virtually obsolete today.
This word is almost extinct in modern English, but it shows how speakers once tried to create opposites by simply adding '-less' to any word—a process that mostly stopped working because we preferred 'strong' over 'weakless'.
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