Conceitedness comes from conceited + -ness. Conceit derives from conceive, from Old French concevoir, from Latin concipere ('to take in, conceive'), from com- (intensive) + capere ('to take'). The historical trail runs through concipere in Latin and capere in Latin. Morphologically, conceitedness is transparent: it draws on conceited + -ness. Used as a noun, conceitedness now means "excessive pride in oneself; vanity", so the present definition can be read against the older forms and meanings. The same lexical family is also visible in related forms such as conceited, conceit, and conceive. The result is a borrowed or transmitted form whose modern spelling carries a compact record of its route into English.