[cach.in.nate] vi -nat.ed ; -nat.ing [L cachinnatus, pp. of cachinnare, of imit. origin] (1824): to laugh loudly or immoderately -- cach.in.na.tion n
CACHINNATE
Meaning of CACHINNATE in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012