desideratum

We'd like to introduce you to some close cousins of the common word desire. All trace their roots to the Latin sīder-, or sīdus, which has historically been understood to mean "heavenly body," but which may also have an older, non-celestial meaning of "mark, target, goal." Whether etymologically starry or grounded, dēsīderāre, meaning "to long for," was born when Latin de- was prefixed to sīder-. Dēsīderāre begat Anglo-French desirer, which in turn brought forth English desire, desirous, and desirable in the 13th and 14th centuries, with desideration following in the 15th. Then, in the 17th century, English acquired desiderate ("to wish for") and desideratum (desiderata in the plural), all of which can lay claim to direct ancestry from desiderare.