Answer:
destructive
, damaging or harmful.
Explanation:
The words closest to devastating in meaning are
destructive
, ruinous
, disastrous
, catastrophic
, calamitous
, cataclysmic
, pernicious
, noxious, harmful
, damaging
, injurious
, hurtful and wounding. Devastating means highly destructive and damaging something happen to something or somebody. All the words present in the above are same in meaning to the word devastating.
