Ahh, okay I get what you're saying. I'm an absolutely unashamed lover of words and language, some might say a
sesquipedalian even (

see what I did there?) and yet agree totally with you. I've been reading Koontz for years and remember clearly what you're saying happening to me in the days before integrated Kindle dictionaries. I think it was
Phantoms where I had to resort to the dictionary on a number of occasions. It was the mid-80s and I was in my teens, so at the time assumed it was just my youthful lack of knowledge that was causing me to stumble.
Something else that has long bugged me about some of his writing is the way he sometimes uses (to my mind) strange metaphors. Here's an example of both issues that we're talking about
:
There is, however, a counterargument (isn't there always?!) that suggests that as writers we should act as custodians of the language we write in and avoid the temptation to dumb down our language in order to help keep its' nuance and beauty alive, but also to help readers grow their own vocabulary. There's an interesting
article here that highlights this concern. The conclusion to that article is where I think we all should be aiming: