Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ăd-aero, āvi, ātum, 1, v. ā. [aes], to estimate by money, to rate, appraise, value: in adaerandis reliquorum debitis non molestus, Amm. 31, 14: ita ut nihil adaeretur, i. e. ita ut nihil in pecunia praestetur, Ep. Imp. Valeriani ap. Trebell. Claud. 14.