From Longman Dictionary of Contemporary Englishresitre‧sit /ˌriːˈsɪt/ verb (past tense and past participle resat /-ˈsæt/, present participle resitting) [transitive] British English SEto take an examination again, because you failed it or did not do well enough SYN retake —resit /ˈriːsɪt/ noun [countable]→ See Verb table
Examples from the Corpus
resit• It only makes sense to resit an exam if you strongly believe you will do better.• Students intending to resit an examination will normally return to the centre where they originally studied in order to take the resit examination.• Disqualified drivers can now be required to resit tests of longer duration. 