(dis)
1. In Roman mythology, god of the lower world: identified with Pluto.
2. The kingdom of the dead: identified with the Greek Hades.

1. Apart; away from: disembody, dislodge, dismiss, dissolve.
2. The reverse of or the undoing of (what is expressed in the rest of the word): disarm, disband, disconnect, disrobe, disown.
3. Deprivation of some quality, power, rank, etc.: disable, disbar, discolor, disenfranchise.
4. Not: disadvantageous, disloyal, distasteful.
5. Completely; thoroughly (simple intensive with an already negative word): disannul. Also: di- before b, d, l, m, n, r, s, v, and usually before g, as in digress, direct, diverge (in Late Latin this was often changed back to the full form, as in dismiss, disrupt); dif- before f, as in differ. The living English prefix is always in the form dis-. [<L dis-, sometimes replacing OF des-(see DE-)]

Var.of DI-². [<Gk. dis twice]