de-
/diː/ /di/prefix
1(Forming verbs and their derivatives) down; away: descend deduct
1.1Completely: denude derelict
2(Added to verbs and their derivatives) denoting removal or reversal: deaerate de-ice
3Denoting formation from: deverbal
Origin
From Latin de 'off, from'; sense 2 via Old French des- from Latin dis-.