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 cachinnari could not be parsed. Trying a normal dictionary lookup:
No entries found. Showing closest matches:
căchinnābĭlis, e, adj. [cachinno] (Appuleian).
căchinnātĭo, ōnis, f. [cachinno], a violent laughing, immoderate laughter: sine ullā suspitione nimiae suspitionis, Auct. Her. 3, 14, 25: ut si ridere concessum sit, vituperetur tamen cachinnatio, Cic. Tusc. 4, 31, 66.