defensible

The word "defensible" has a martial origin rooted in physical protection. It descends from the Latin defendere, meaning "to ward off, repel, protect," which itself is a compound of de- (away, off) and -fendere (to strike). The literal sense was to strike away a threat. Over time, the meaning broadened from the physical act of repelling an attack to the more abstract concept of providing justification or support for an idea or position. The suffix -ible transforms the verb concept into an adjective, describing something that is capable of being defended, whether it is a fortress or an argument.

Structure: de (down, away) + fens (strike) + ible (capable of) - de: A Latin prefix meaning "down, away, from, off." In this context, it conveys a sense of "warding off." - fens: A direct substring from the English spelling, derived from the Latin root fendere (to strike, hit). It is a variant of the root found in "defend." - ible: A suffix of Latin origin (-ibilis), meaning "capable of, able to be." It forms adjectives.