IPA: /ʌnˈfæmɪlɪrli/
KK: /ʌnˈfæmɪlɪrli/
In a way that is not known or recognized; in a strange or unusual manner.
She looked at the new city unfamiliarly, feeling lost and out of place.
Unfamiliarly → It is formed from "un-" (meaning not) and "familiar" (from Latin "familiaris", meaning of a household or well-known) and the suffix "-ly" (meaning in a manner). The word "unfamiliarly" means in a manner that is not familiar or known.
Think of 'not' ('un-') being added to 'familiar' (which means well-known) to remember that 'unfamiliarly' describes something done in a way that is not known or familiar.