Causing destruction; tending to bring about ruin, death, or devastation; ruinous; fatal; productive of serious evil; mischievous; pernicious; -- often with of or to; as, intemperance is destructive of health; evil examples are destructive to the morals of youth.

Designed or tending to disprove or discredit.

One who destroys; a radical reformer; a destructionist.

destroying or intending to destroy.

causing destruction or much damage; "a policy that is destructive to the economy"; "destructive criticism"

To demolish, damage, or probe any system, structure, or component, or to dismantle any system or component that would not be taken apart by an ordinary person in the course of normal maintenance.

(~ function) Capable of modifying its arguments.

adj. (of an operator) capable of modifying some program-visible aspect of one or more objects that are either explicit arguments to the operator or that can be obtained directly or indirectly from the global environment by the operator.

See  Interference

Interference : When out of phase waves come together, the resulting wave is the difference of the two original waves. Opposite of constructive interference.

Any image editing technique that permanently alters pixels. Not all destructive techniques are bad. Resampling an image to be larger or smaller is destructive, but is commonly done.