clamber
Definitions
To climb, move, or get in or out of something in an awkward and laborious way, typically using both hands and feet.
To scramble or climb with difficulty.
Examples
The children began to clamber over the rocks to reach the hidden beach.
She had to clamber up the steep embankment to escape the rising tide.
The kittens tried to clamber onto the sofa, but they kept sliding off the fabric.