Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
praestōlor, ātus (inf. paragog. praestolarier, Plaut. Ep. 2, 2, 33; act. collat. form praestolaras, Liv. And. ap. Non. 475, 32: praestolabo, Turp. ap. ib. 475, 31; cf. App. M. 5, 20), 1, v. dep. n. and a. [1. praesto], to stand ready for, to wait for, expect a person or thing (syn.: opperior, exspecto): praestolari dicitur is, qui ante stando, ibi, quo venturum excipere vult, moratur, Paul. ex Fest. p. 223 Müll.; cf.: praestolari est praesto esse et apparere, Don. ad Ter. Eun. 5, 5, 5.