まして
況して
mashite

Adverb
Expression

1. still more; to say nothing of; not to mention

Usually Written in Kana
それらのほし肉眼にくがんえる、まして望遠ぼうえんきょうならなおさらである。
sorerano hoshiwa nikugande mieru mashite bōenkyōnara nao saradearu.
You can see the stars with your naked eye, and even better through a telescope.
Adverb
Expression

2. still less

Usually Written in Kana
メアリーはフランスむことさえできない、ましてはなすことはできない。
meariiwa furansugō yomu kotosae dekinai mashite hanasu kotowa dekinai.
Mary can't even read French, much less speak it.
Other forms: