road, way, journey
If you are impervious to things, such as someone's actions or words, you are not affected by them or do not notice them.
To obviate a problem is to eliminate it or do something that makes solving the problem unnecessary.
When someone's behavior deviates from the norm, they act differently than other people; when someone deviates from a given course, they go in a different direction.
Something that is trivial is insignificant, commonplace, of little value, or not important.
Someone who is being devious is purposefully being dishonest, tricky, not straightforward, or secretive for an underhanded purpose.
Something that is obvious is easy or simple to see or understand.
The word previous describes something that came before something else.
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