knowable

the word knowable is a late middle english formation, built upon the old english verb root 'know', which itself descends from the proto-germanic knēaną, related to concepts of perception and recognition. this root was combined with the productive suffix '-able', of latin origin, which was adopted into english via old french to mean 'capable of'. the literal construction 'capable of being known' perfectly captures the modern abstract meaning, illustrating a straightforward morphological process where a native germanic verb is rendered into a passive-adjectival form using a borrowed romance suffix, a common pattern in english word formation.

Structure: know + able know (from old english cnāwan, meaning to perceive, recognize, understand; a verb root). able (from latin -ābilis, via old french, a suffix forming adjectives meaning 'capable of, fit for').