ultra-
From Longman Dictionary of Contemporary Englishultra-ultra- /ʌltrə/ prefix 1 EXTREMEextremely an ultra-modern building He remained ultra-cautious. an ultra-light jacket2 technicalABOVE above and beyond something in a range ultrasound (=sound that is too high for humans to hear) → infra-Examples from the Corpusultra-• an ultramodern building• ultraviolet lightOrigin ultra- Latin ultra “beyond”, from ulter; → ULTERIOR