疎か
1
not to mention ...;needless to say ...;not to speak of ...;not only ...
after 〜は or 〜も
私の連れは疲れすぎていて走るのはおろか、歩くこともできない、と言った。
My companion said that she was too tired to walk, let alone run.
2
negligent;neglectful;careless;remiss
See also:
疎か (おろそか)