资料来源 : Webster's Revised Unabridged Dictionary (1913)

De- \De-\
   A prefix from Latin de down, from, away; as in debark,
   decline, decease, deduct, decamp. In words from the French it
   is equivalent to Latin dis-apart, away; or sometimes to de.
   Cf. {Dis-}. It is negative and opposite in derange, deform,
   destroy, etc. It is intensive in deprave, despoil, declare,
   desolate, etc.