Encumbered vs. Incumbered

Weighted down, loaded sufficiently to make slow.

simple past tense and past participle of encumber

loaded to excess or impeded by a heavy load;

Example: ‘a summer resort...encumbered with great clapboard-and-stucco hotels’; ‘a hiker encumbered with a heavy backpack’; ‘an encumbered estate’;

simple past tense and past participle of incumber