Explanation
'Not only...but also', 'not to mention', 'to say nothing of'
Formation
Noun + はおろか + Noun + も
Detailed explanation
The 'Noun はおろか～も' grammar point is used to list items with an emphasis on how far the situation extends. It often appears in negative contexts to show that something supposedly more advanced (first part) is out of the question, and even something simpler (second part) is also not possible. It can be translated as 'Needless to say X, (he/she) can't even do Y.'
Examples
E wo kaku koto wa oroka, ji sae kakenai.
Needless to say drawing pictures, he can’t even write letters.
Kare wa eigo wa oroka, nihongo mo wakaranai.
Needless to say English, he doesn’t even understand Japanese.
Kanojo wa suugaku wa oroka, sansuu mo tokui dewa nai.
Needless to say mathematics, she isn’t even good at arithmetic.
Kare wa hashiru koto wa oroka, aruku koto mo muzukashii.
Needless to say running, he finds even walking difficult.
Practice
Grammar content sourced from hanabira.org.