Pristine: People think "pristine" means “spotless” or
“good as new” when it actually means “Ancient, primeval; in a state virtually
unchanged from the original."
Yes, it obviously has to do with some unpleasant and loud noise, right?
Actually, Noisomeisn't about noise. It means obnoxious or
objectionable to the senses, especially the sense of smell. It's a synonym ofnoxiousandmalodorous,notcacophonousordissonant.
It's related toannoy.