How many adjectives can you think of that have the prefix un that mean something good or positive?
unbelievable (could be good depending on the situation)
unreal (is always good to me)
unsweetened (definitely a good one! unsweetened tea :P)
unzipped (oh, baby!)
undressed (oh yeaaahh)
UNBIASED! (super good one)
there are just so many >.< I could go on and on
How do you avoid adjectives and adverbs when writing description?
toolate, the general idea in avoiding adverbs by using a better verb that doesn't need enhancement or explanation is solid. It makes the writing stronger and the word count lower to say "Shelly stomped on the doll" rather than "Shelly stepped on the doll very hard."
The adjective-avoidance is solid for a different reason. It forces the author to include only what detail needs to be there for the reader to see the scene and for the story to progress. If what matters is Shelly stomping on the doll, then the doll's hair color, the kind of shoe Shelly is wearing, and the room's decor are irrelevant details which only hinder the flow.
You will find that you write far leaner, without losing anything, if you minimize adjectives. Since many beginners write 'fat,' this technique can serve you very well. Er, make that 'serve you well.'
You could say loving or caring naturalist.
Loving or caring would be ATTRIBUTIVE adjectives in this case. An attributive adjective is part of the noun phrase headed by the noun they modify. The noun in this case, is naturalist. You can play around with this to find a combination that suits you.