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 roborare could not be parsed. Trying a normal dictionary lookup:
No entries found. Showing closest matches:
* rōbŏrārĭum, ii, n. [robur], an enclosure for animals, built of oaken boards (= vivarium), Scip. Afric. ap. Gell. 2, 20, 5 sq.