the adjective 'witty' originates from the old english noun 'witt', which denoted the mind, intellect, or understanding. this old english term is cognate with old high german 'wizzi' (knowledge) and ultimately derives from the proto-germanic root witją, meaning 'knowledge'. this germanic root can be traced further back to the proto-indo-European root weid-, meaning 'to see' or 'to know', which is also the source of latin 'vidēre' (to see) and english words like 'wisdom' and 'vision'. the semantic evolution moved from the general capacity for knowledge ('witt') to the specific, clever, and humorous application of that intelligence, giving us the modern sense of 'witty'.

the word is a simplex form derived from the old english noun 'witt', meaning 'mind, understanding, intelligence'. it is not productively segmented into separate morphemes in modern english.