Grammar Info
N1 Lesson 7: 11/17

は疎(おろ)か
let alone, much less, needless to say, not to mention, not only but also

Structure
Noun (A) + おろか + Noun (B) + さえ(1)

(1)まですら
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使用域 硬い
Information
  • (A) はおろか (B) も is a slightly old fashioned expression meaning “let alone (A), (B)”. Literally “It is foolish to mention (A) when even (B)”. It is usually used in negative contexts. When followed by the negative form it means that something is not even the case for (B), then by the same logic it's all the more not the case for (A). When followed by the positive form it means that something is the case even for (B), then by the same logic it's all the more the case for (A).
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「ルームメイトはオムライスはおろか、おにぎりさえ作(つく)れない。」
“My roommate cannot even make onigiri, let alone omurice.”
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最近(さいきん)、痔(じ)が痛(いた)み出(だ)したなぁ。座(すわ)ってるのはおろか歩(ある)くのも痛(いた)いぞ。」
“Recently my hemorrhoids have been so painful. It even hurts to walk, much less sit.”
Notice that verb can be used after nominalizer の or こと
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《小説(しょうせつ)》敵(てき)はおろか味方(みかた)からも恐(おそ)れられ、「バーサーカー」と言(い)われるようになった。
Novel: Feared by friends, let alone enemies, she has come to be called “berserker”.
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Try N1
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Shin Kanzen Master N1 Bunpou
Page 17
Sou Matome Bunpou N1
Page 126
A Dictionary of Advanced Japanese Grammar
Page 694