IPA: //ʌnˈfeɪzd//
KK: /ʌnˈfeɪzd/
Not feeling worried or upset by something that might normally cause concern.
She remained unfazed by the criticism and continued with her work.
Unfazed → It is formed from "un-" (meaning not) and "fazed" (from the verb "faze", which is of uncertain origin but likely derived from the dialectal English "faze" meaning to disturb or disconcert). The word "unfazed" means not disturbed or disconcerted by something.
Think of 'not' ('un-') being added to the idea of being 'disturbed' or 'disconcerted' ('fazed'). This helps you remember that 'unfazed' means someone who remains calm and unaffected.