verb / noun
lean
LEEN/liːn/
To incline from upright toward a point of support.
The woman leans sideways with her shoulder supported by the wall.

Etymology
Old English hlinian combined resting with bending or inclining. Leaning against something brings those ideas together: the body tilts while relying on an object for support.
In context
Let's say I do decide to sit under that tree on my long walk today. I step off the path and sit down and lean back against the trunk.
More examples
- I lean my bike against the garage wall.
- The fence has a slight lean toward the road.
- He leaned on his cane as he crossed the room.
Forms
lean · leans · leaned · leaning