プログレッシブ和英中辞典(第4版)の解説
それとなく【×其れとなく】
それとなく彼に注意した
We warned him in a roundabout way.／We warned him, though not in so many words.
それとなく事実を知らされた
I was informed of the fact by implication.
彼はそれとなく申し出を断った
He indirectly declined the offer.／He intimated that he did not want to accept the offer.
彼はそれとなくこちらを見た
He glanced this way casually [out of the corner of his eye].