the word "unworkable" is a modern english formation built from native germanic and borrowed latinate elements. its core, "work," stems from the old english noun weorc and verb wyrcan, which have deep proto-germanic roots related to doing or making. the negative prefix "un-," also from old english, is one of the most common and productive negators in the language. the suffix "-able," entering english via old french from latin, attaches to verbs to form adjectives meaning "capable of being [verb]ed." therefore, the literal morphemic construction "not capable of being worked" logically evolved into the modern abstract sense of something being impractical or impossible to implement or use effectively.

Structure: un (not) + work (to function) + able (capable of) - un: a prefix of germanic origin (old english) meaning "not," used to give a negative or opposite force. - work: a root of germanic origin (old english weorc) meaning "to function, to operate, to perform labor." - able: a suffix of latin origin (via old french -able, from latin -abilis) meaning "capable of, fit for, tending to."