As the tsunami hits your scooter and your car, it alters the wave, creating ripples.
Ripples come off of your scooter and car from when they were hit by a tsunami. More importantly, those things were rentals (れん), so ripples or not, it doesn't matter if they were hit by a tsunami.
Currently there are no similar looking kanji which exist in the WaniKani learning system
Currently there are no vocabulary in our databases that utilized the kanji. Don't fret! We will have vocabulary available soon!