Take your fingers and dig the tree bits out of this cleat to gather it into evidence. Gather it in a pile or a bag, just make sure it's all in one place so you can take a closer look later.
You gather them all together and realize there are cyborg (さい) parts mixed in with the tree bits. Uh oh, it's as you feared. Your cyborg definitely got into trouble somewhere around here and you walked all over it with your cleats.
Currently there are no similar looking kanji which exist in the WaniKani learning system