Bosworth-Toller's Dictionary translates the hapax legomenon idig queryingly
as 'busy, active', Holthausen in his Altenglisches etymologisches Worterbuch translates it 'fleissig', and Grein-Kohler's Sprachschatz defines it as 'avidus' with a query.
Merely as a gesture of deference toward his seniority I said queryingly
, "This is a pioneering work, isn't it?" Which, to my surprise, immediately angered him, and he responded icily, "Ah, the public is ever so forgetful.