What is the meaning of root word sti?

The root word "sti" doesn't have a common, independent meaning on its own in English. It's usually part of a larger word, and its meaning depends on the other parts of the word.

For example, you might see "sti" in words like:

* "Stipend": This word means a regular payment, especially a salary for a priest or other clergyman.

* "Stipulate": This means to specify a condition or requirement.

* "Stipple": This refers to a technique in drawing or painting that uses dots to create shading.

To understand the meaning of "sti" in a particular word, you need to consider the whole word and its context.