hé​kuàng HSK7

besides

何况 (何況) hé​kuàng
besides conjunction
besides; what's more; in addition (used to provide an additional reason)

I don't plan to go, not to mention I still have a lot of work to finish.

let alone conjunction
let alone; to say nothing of (used to emphasize a more extreme case)

He can't even speak Mandarin well, let alone classical Chinese.

Frequency

Movie subtitles
6.83 per million appears in 3% of films
Written text
13.1 per million

Details

HSK 2.0
Level 5
HSK 3.0
Level 7

Sources

Definitions
CC-CEDICT