The English prefixessyn-along with its variantsym-, derived from Greek, mean “together.” You can remembersyn-easily by thinking ofsynonym, which is a word that goes “together” with another word because it has a similar meaning. You can remembersym-by thinking ofsymphony, which is a gro...
I suggest that parameters be allowed to be more than one letter, and that an initial letter X be used for really local idiosyncracies [sic]. This "X" prefix was subsequently used in [RFC737], [RFC743], and [RFC775]. This usage was noted in [RFC1123]: FTP allows "experimental" ...
the string "X-" or similar constructs. In practice, that convention causes more problems than it solves. Therefore, this document deprecates the convention for newly defined parameters with textual (as opposed to numerical) names in application protocols. Status of This Memo This memo documents an...
"one's own, personal, distinct," from Greek idios "own, personal, private, one's own"… See origin and meaning of idio-.