IPA: //ʌnˈsɜːrtənnəs//
KK: /ʌnˈsɜrtnəs/
The condition of not being sure or having doubts about something.
Her uncertainness about the decision made her anxious.
Uncertainness → It is formed from "un-" (meaning not) and "certain" (from Latin "certus", meaning sure or fixed) and the suffix "-ness" (meaning the state of being). The word "uncertainness" refers to the state of being not sure or lacking certainty.
Think of 'not' ('un-') being added to 'sure' ('certain') to describe a state of doubt or lack of assurance.