finish, complete, solve
蕆 centers on bringing something to a definitive end: finishing a task, completing a process, or solving a problem so that nothing remains.
蕆 is a rare character. It combines 艹 (plant) with 貝 (shell/money) inside 戊 (a halberd-like shape). The exact historical origin is uncertain; it may have originally related to finishing or settling matters, but the component story is not well documented.
Picture a plant 艹 growing over a halberd 戊 that encloses a shell 貝. The plant covers everything, finishing the scene and completing the arrangement.
For テン, imagine finishing a task and then taking ten deep breaths: ten -> テン, as you complete the work.