There's a tsunami coming and you can't stop the explosion of bitterness in your mouth. You're scared. Your mouth tastes bitter and astringent.
This word also means reluctant, because wouldn't you be reluctant to let a tsunami come wash you away with that bitter explosion of flavor in your mouth?
With the bitter taste in your mouth, you reluctantly gather up all of your jewels (じゅう) and wait for the tsunami to take you away. At least with your jewels with you, there may be some hope of selling them and building a better life if you make it.
Currently there are no similar looking kanji which exist in the WaniKani learning system