The word "cognisor" is not recognized in English, so no IPA transcription can be provided. Perhaps the original word intended was "cognizor", which is pronounced as "kog-nuh-zawr" / kɒɡˈnaɪzɔr/. It is a legal term that refers to a person who grants a lien or mortgage on their property or goods for a debt or obligation. It is important to be aware of correct spelling and pronunciation, especially in legal matters, to avoid misunderstanding or confusion.
One who acknowledges the right of the cognisee in a fine; the defendant. Note-The preceeding words are sometimes spelt with z.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.