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 derisionis could not be parsed. Trying a normal dictionary lookup:
No entries found. Showing closest matches:
dērīsĭo, ōnis, f. [derideo], a laughing to scorn, mockery, derision (late Lat. for irrisio, illusio), Arn. 7, p. 239; Lact. 4, 18.