なお

なお is a formal conjunction and adverb with two distinct usages: one meaning "furthermore / in addition" (adding supplementary information), and the other meaning "still / yet" (indicating that a state continues unchanged). It is commonly found in written language, announcements, formal speech, and business communication.

Furthermore / In addition

When placed at the beginning of a sentence, なお introduces supplementary or additional information related to what was just stated. It is similar to さらに or また, but なお specifically signals that what follows is a supplementary remark or note – not the main point, but something the listener/reader should also know.

This usage is very common in announcements, notices, and formal writing. It corresponds to "Please note that…" or "Furthermore,…" in English.

Still / Yet (continuing state)

なお can also function as an adverb meaning "still" or "yet", indicating that a condition or state persists or continues unchanged despite expectations or the passage of time. In this usage, it often appears before a verb or adjective, similar to まだ but with a more literary or formal tone.

なお + Comparative

なお can intensify comparatives, meaning "even more / still more".

This is similar to さらに or もっと but carries a more formal and emphatic nuance.