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not comparable
Defenceless and lacking weapons.
Lacking both weapons and protective armour. examples
(biology) Not having thorns, claws, or other dangerous appendages.
(obsolete) Unaided, as of the vision without a glass. quotations
[…] in order to see such Objects as are very remote, purblind Persons must make Use of concave Glasses, whose Radii are equal to the Distances at which they see distinctly with their unarmed Eyes.
1759, William Porterfield, A treatise on the eye, the manner and phaenomena of vision