Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ap-prĕcor (adp-), āri, v. dep., to pray to, to adore, worship (very rare, perh. only in Hor. and App.): Rite deos prius adprecati, * Hor. C. 4, 15, 28; App. M. 11, p. 266, 23: deam, id. ib. 11, p. 4, 1.