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.
[医] 脱, 去, 除, 离, 解除