Chafe
Below the canopy of trees is a hand. The hand is just there to chafe against the trees.
There's a hand just chafing against some trees. That's... interesting.
ま
さす
None
As the hand chafes on the trees, it says mama (ま), mama.
This is the hand of a child looking for its mama. And, it chafes against trees to try and find the warm, soft touch of its mama. Instead, it only finds rough bark, so it continues its chafing.