corroborate in Polish
corroborate in Polish
potwierdzać
(transitive) To confirm or support something with additional evidence; to attest or vouch for.
potwierdzić
(transitive) To confirm or support something with additional evidence; to attest or vouch for.
umacniać
(transitive) To make strong; to strengthen.
umocnić
(transitive) To make strong; to strengthen.