the word 'tunable' is a modern english formation, directly combining the existing english word 'tune' with the productive adjectival suffix '-able'. the root 'tune' traces back to the latin 'tonus', which itself originated from the greek 'tonos', carrying the core meaning of 'stretching' or 'tension', a concept that evolved to describe musical pitch. the suffix '-able', of latin origin via french, systematically creates adjectives meaning 'capable of undergoing the action of the verb'. therefore, the literal morphemic construction 'capable of being tuned' logically evolved from the ancient concept of adjusting tension to control pitch to its modern, broader application in electronics and mechanics.

Structure: tune + able tune (from middle english, from old french 'ton', from latin 'tonus' meaning 'sound, tone', from greek 'tonos' meaning 'tension, tone') + able (from old french '-able', from latin '-abilis', a suffix forming adjectives meaning 'capable of, fit for').