What is the Latin word for defenceless?

The usual Latin words for “defenceless” are inermis, impediō, intūtus; also indēfēnsus. The right choice depends on the sense; see the distinctions below.

English → Latin

“defenceless” in Latin

inermisunarmed, defenceless; toothless impediōto hinder, impede, prevent, obstruct, hamper, thwart; to embarrass intūtusunguarded, defenceless; unsafe, dangerous indēfēnsusunprotected, undefended

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

defenceless

inermis (without arms): armis exutus (disarmed): impeditus (prevented from using arms); intutus (unprotected): defensoribus nudatus (deprived of defenders; both of places): indefensus (Liv., undefended): sine praesidio; non tutus: non munitus (of a town, etc.).

Quick answer

What is the Latin word for defenceless?: The usual Latin words for “defenceless” are inermis, impediō, intūtus; also indēfēnsus. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.