IPA: /nəˈtɛəriəl/
KK: /nəˈtɛrɪəl/
Relating to a notary public, a person authorized to perform certain legal formalities, especially to certify documents.
The notarial certificate confirmed the authenticity of the signatures on the contract.
Notarial → It is formed from "notarius" (meaning a clerk or scribe) and the suffix "-al" (meaning pertaining to). The word "notarial" refers to something that pertains to a notary or the duties of a notary.
Think of a 'notary' as a clerk or scribe, and remember that 'notarial' means related to the work of a notary.