unaccustomed
UK: ˌʌnəˈkʌstəmd | US: ˌʌnəˈkʌstəmd
adj. not familiar or habitual; not used to something
adj. unusual or unexpected
The word "unaccustomed" combines the negative prefix "un-" with "accustomed," which traces back to Latin roots related to habit or custom. The prefix "un-" flips the meaning to indicate a lack of familiarity or deviation from the norm. Over time, "accustomed" evolved from literal habits to broader contexts of familiarity, while "unaccustomed" emerged to describe novelty or discomfort with the unfamiliar.
She was unaccustomed to the cold weather after living in the tropics.
His unaccustomed silence made everyone uneasy.
The team faced unaccustomed pressure during the finals.
The lavish party was an unaccustomed experience for the modest family.
Unaccustomed to public speaking, he stumbled over his words.