Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
‡ mercēdārĭus, ii, m. [merces], he who pays wages: ostende mercedarios tuos, Sen. Contr. 5, 33, 5 and 25; cf. Gloss. Isid. s. v., ‡ 1. mercedonius.