What is the root of word devised?

The root of the word "devised" is the Latin verb "dividere", meaning "to divide" or "to separate".

Here's how the word evolved:

* "dividere" (Latin) -> "diviser" (Old French) -> "devise" (Middle English) -> "devised" (Modern English)

The meaning of "devise" shifted over time from its original meaning of "to divide" to "to plan" or "to invent." This shift is likely due to the concept of "dividing" one's thoughts or resources to create something new.