The grain stuck in your cleat had a former life. In that life it was a rice plant. It was a happy little rice plant, minding its own business, when it was yanked up and cleaned up and put in a bag for people to buy and cook and eat. That was so long ago. Now it's just a sad grain in the bottom of your shoe.
The grain of rice, as it thinks about its rice plant life too, mutters, "いな、いね." Yes little grain, it was a really nice life. I'm sorry.
Currently there are no similar looking kanji which exist in the WaniKani learning system