adjunct, devastating, definitive, substantiate

adjunct: 부가적인것

formal something added or connected to a larger ormore important thing:
I hoped I would find the computer course a useful adjunct to my other studies.
--------------------------------------------------------------------------------------------------devastating: 엄청나게 충격적인.
causing a lot of damage or destruction:
If the bomb had exploded in the main shopping area, it would have been devastating.
The drought has had devastating consequences/effects.
----------------------------------------------------------------------------definitive

not able to be changed or improved: 딱 정해진, 확고한
a definitive judgment/ruling
There are no definitive answers/solutions to this problem.
The police have no definitive proof of her guilt.

 considered to be the best of its type: 거의 완벽한
He's written the definitive guide to Thailand.
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substantiate: 입증되다, 사실로 밝히다.
to show somethingto be true,or to support a claim with facts:
We have evidence to substantiate the allegations againsthim.
Reports that children had been hurt have not beensubstantiated.

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