Mātertera Petunia dēbuit festīnāre ut eī afferret pōtiōnem magnam coniaci

[jacktthekilns]

This is from the Latin version of the first Harry Potter book. My main issue is "coniaci" It looks like a form of 'coniaceo' but I cannot find this form anywhere.

 

[Agrippa]

Famous French brandy: Cognac! > coniacus, i m. (neologism)

 

[jacktthekilns]

thanks so much!