preventable

the word preventable is built upon the verb prevent, which originates from the latin praevenire, literally meaning 'to come before'. this core idea of acting in advance to forestall an event evolved into the modern sense of stopping something from happening. the suffix -able, of latin origin, is then attached to form an adjective meaning 'capable of being prevented'. thus, the entire word logically conveys the concept that an undesirable outcome is not inevitable and can be averted through prior action.

Structure: prevent (to stop) + able (capable of) prevent (from latin praeventus, past participle of praevenire meaning 'to come before, anticipate, hinder', from prae- 'before' + venire 'to come'); able (from latin -abilis, an adjective-forming suffix meaning 'capable of, fit for').