Laghukoshasamgraha 12.20

12.20

kārakaṃ karttṛkarmādyoḥ kārikā yātanā nadī |
kṛtau vivaraṇaśloke nāpitādikakarmaṇi ||

kāraka denotes an agent, an object, and so forth; kārikā is torment, a river,
a performance, an explanatory verse, and the work of a barber and the like;