dis-

The prefix dis- (also di-, dif-) first appeared in English words in the Middle English period in words borrowed from French (usually as the French des-). It comes from the Latin prefix dis-, which is thought to have come from 'duus' two and thus had the most basic sense of 'two ways' hence 'apart.' It was attached to words of non-Latinate origin as early as 1563 (such as the now ungrammatical 'disalike') and became a living, productive prefix (though nearly always combined with Latinate roots) by no later than the mid-1600s. It still is a living, productive prefix, although in a limited capacity (mainly science and noncewords).
See more at Wikipedia.org...

A prefix from the Latin, whence F. des, or sometimes de-, dis-. The Latin dis-appears as di-before b, d, g, l, m, n, r, v, becomes dif-before f, and either dis-or di- before j. It is from the same root as bis twice, and duo, E. two. See Two, and cf. Bi-, Di-, Dia-. Dis-denotes separation, a parting from, as in distribute, disconnect; hence it often has the force of a privative and negative, as in disarm, disoblige, disagree. Also intensive, as in dissever.
  

A prefix from Gr. di`s- twice. See Di-.
  

.
  

dis-
(tiền tố tạo với tt, pht, dt, đgt) không, bất, thất
(C) 2007 www.TừĐiểnTiếngViệt.net

prf. แยกจากกัน, ไม่เหมือนกัน, ตรงกันข้าม