What does なおさら mean?
なおさら is a Japanese adverb meaning “all the more, still less” in English. It is written as なおさら in hiragana, and naosara in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
それらの星は肉眼で見える、まして望遠鏡ならなおさらである。
You can see the stars with your naked eye, and even better through a telescope.