The king wants you to make a rocket that looks glassy. It won't be very stable, and it probably won't work, but making it glassy and pretty is the only way to make the king approve.
You take the glassy rocket and try to stuff some thin reeds (り) inside to support it. But because it's clear and glassy the king sees them at the last second.
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!