SuGoiSuす語彙すGrammar › N1 · 13 Limits and inclusion
〜はおろか: let alone
N1 · 13 Limits and inclusion
Written: "not to mention A, even B", usually with a negative.
A はおろか B も/さえ + negative. A is the easier item: ひらがなはおろか、漢字も読めない.
Examples
彼はひらがなはおろか、漢字も読めない。
He can't read hiragana, let alone kanji.
貯金はおろか、借金さえある。
He has debts, let alone savings.