IPA: /ˌʌn.fʊlˈfɪld/
KK: /ʌnˈfʊlfɪld/
Not having achieved what one wanted or expected; feeling disappointed because goals or desires have not been met.
She felt unfulfilled in her job because it did not challenge her skills.
Unfulfilled → It is formed from "un-" (meaning not) and "fulfilled" (from Old English "fullian", meaning to fill). The word "unfulfilled" means not filled or not satisfied, indicating a lack of completion or achievement.
Think of 'not' ('un-') being added to 'filled' — this helps you remember that 'unfulfilled' means something that is not filled or completed.