Read ひゃくじにょい
KM hung a scroll like this, very impressive, in VII 2026
She explained the meaning as follows:
百事 lit. means hundred things and thus, everything.
如 is like, I guess a bit like 是 it acts as a copula.
意 is the same as in 意見, meaning wish.
➡️ Everything is as you wish. Of course, if you have a specific wish, it isn't; but if you don't, everything flows of its own accord as it should be.
Background
Not strictly from 禅, but rather Chinese Buddhism.
The 如意 is also a tool that allows you to scratch your back where ever you want, as you wish. In Chinese, it's read as rúyì. It then became a ceremonial short staff carried by Buddhist monks.
➡️ I think this makes a grate 御銘 for a 茶杓.