Inermis

·adj Unarmed; destitute of prickles or thorns, as a leaf.

inermis
ĭn-ermis, e, and in-ermus, a, um (v. Neue, Formenl. 2, p. 88), adj. [2. in-arma], unarmed, without w...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
inermis
inermis e, adj.2 in+arma, unarmed, without weapons, defenceless : tribunus: milites, Cs.: latrones...

An Elementary Latin Dictionary