The word "unburdened" means to be relieved of a burden or free from a load. Antonyms for "unburdened" include weighed down, burdened, encumbered, and overloaded. "Weighed down" implies feeling overwhelmed with responsibilities or problems. "Burdened" connotes feeling a heavy weight or duty on one's shoulders. "Encumbered" suggests being hindered or impeded by something that gets in the way. And "overloaded" suggests being overwhelmed with excess or an excessive amount. These antonyms highlight the opposite of feeling free and unencumbered and can be used to describe situations where people feel weighed down or overburdened by responsibilities or stress.