Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
The word siderari could not be parsed. Trying a normal dictionary lookup:
No entries found. Showing closest matches:
sīdĕrālis, e, adj. [sidus], of or belonging to the stars, sidereal (Plinian): scientia, Plin. 7, 49, 50, § 160; cf. difficultas, astronomy, id. 18, 24, 56, § 206.
sīdĕrātīcĭus or -tĭus, a, um, adj. [sideratio], planet-struck, blasted, palsied (late Lat.): jumenta, Veg. 5, 34; cf. sideror.
sīdĕrātĭo, ōnis, f. [sideror].
sīdĕrātus, a, um, v. sideror.