F is for Falling
Fall: to drop under the force of gravity.
…
Monk would never have told anyone how jealous he actually was the time when he thought he saw Ayako and Naru kissing in the hallway on the monitor, after she had offered to walk him to his room. He couldn't understand why he was jealous, because he could not possibly be falling for her.
So his foremost reaction was to ridicule her, to hide it. But she quickly turned the tides with her ritual of cleansing the ghosts with the bell and trees. He couldn't say anything degrading after that.
He had a lot of thinking to do about her.