60It must be borne in mind that the requirement for contractual terms to be transparent, provided for in Article 4(2) of that directive must be understood as requiring not only that the term in question be formally and grammatically intelligible to a consumer, but also that an average consumer, who is reasonably well informed and reasonably observant and circumspect, be in a position to understand the specific functioning of that term and thus evaluate, on the basis of clear, intelligible criteria, the potentially significant economic consequences of such a term for his or her financial obligations (judgment of 10 June 2021, BNP Paribas Personal Finance, C‑776/19 to C‑782/19, EU:C:2021:470, paragraph 64 and the case-law cited).