Cumber means to burden, hamper, or hinder.
Example:
* The heavy boxes cumbered our progress.
However, "cumbersome" itself is not a verb. It is an adjective that means bulky, unwieldy, or difficult to handle.
Cumber means to burden, hamper, or hinder.
Example:
* The heavy boxes cumbered our progress.
However, "cumbersome" itself is not a verb. It is an adjective that means bulky, unwieldy, or difficult to handle.