I believ it's momento mori. I know it as an art term, a reminder of death/the shortness of life, represented by having a skull or hour glass or some similar symbol of death included in a picture.
'Memento Mori' Meaning: 'Be mindful of death', or 'Remember that you are mortal'
The word 森 (mori) means 'forest' in Japanese. Example: 森へピックニックに行こう (mori e pikkunikku ni ikou) - "Let's go on a picnic to the forest."
'Memento Mori' meaning "Remember you're mortal". And whenever the king would came back from a war or something, there would be a parade. But a slave would be behind him saying "Memento Mori", meaning, "You're just like the rest of us. Remember, you will die one day. You don't exceed that rule". So the king is on the front, and there arer trumpet players for the "parade" and them Lacey is the slave saing 'Memento Mori!'. -Hoped this helped.
Ogai Mori's birth name is Rintaro Mori.
Kenya Mori's birth name is Kenya Mori Ochoa.
Carla Mori's birth name is Carla Elizabeth Mori.
Motosada Mori was born in 1964, in Hiroshima, Japan.
I think instead of 'mori' you mean 'muri' /mu ri/, with it the sentence makes sense, and it means "now it's impossible", "with this/this way it's impossible". 'Mori' means 'babysitter' and more commonly 'forest, a small jungle' but because of 'de' it does not fit here meaning-wise.
Mori's Restaurant was created in 1884.
Bombyx mori
Chinatsu Mori was born in 1980.
Daisuke Mori was born in 1971.