unsure
UK: ʌnˈʃʊə | US: ʌnˈʃʊr
adj. not certain or confident
adj. lacking assurance or conviction
The word "unsure" combines the Old English prefix "un-" (meaning "not") with the adjective "sure," derived from Latin "securus" (meaning "free from care" or "certain"). The prefix "un-" has been a productive negation marker in English since the Germanic period, while "sure" entered Middle English via Old French, retaining its core meaning of certainty. Together, they form a straightforward negation of confidence or certainty.
She felt unsure about her decision to change careers.
His voice was hesitant and unsure during the presentation.
The team was unsure whether the project would meet the deadline.
I'm unsure if I locked the door when I left.
His unsure mannerisms revealed his lack of experience.