clamber
US /ˈklæm.bɚ/
UK /ˈklæm.bɚ/

1.
grimper, escalader
climb, move, or get in or out of something in an awkward and laborious way, typically using both hands and feet
:
•
She managed to clamber over the wall.
Elle a réussi à grimper par-dessus le mur.
•
They clambered into the boat.
Ils grimpèrent dans le bateau.