An act of climbing.
"The hikers began their climb up the steep mountain trail at dawn."
move with difficulty, by grasping
"The hikers had to climb the steep, rocky face of the mountain using their hands and feet."
To ascend; rise; to go up.
"The hikers began to climb the steep mountain trail at dawn."
In plain English: To climb means to move upward by using your hands and feet, usually on something steep or high.
"We climbed the hill to get a better view of the city."
The word "climb" comes from the Old English climban, which originally meant to ascend by clinging or sticking something in place. Its roots go back even further to a Proto-Indo-European term for "to stick," reflecting how early speakers described gripping surfaces while moving upward.