Focus on the pronunciation of ostensible
English definition of “ostensible”
/ɑˈsten·sə·bəl/ adj [not gradable]
› appearing or claiming to be one thing when it is really something else: Rous published 60 scientific papers after his ostensible retirement. ostensibly
/ɑˈsten·sə·bli/ adv [not gradable] › If the engine on an ostensibly low-mileage car is filthy, it may have higher mileage than it seems.