To understand the meaning, you need to look at the whole word and its context. Here are some examples:
* Titanium: This element's name comes from the Titans, giant deities in Greek mythology. The "ti" here doesn't have a specific meaning on its own.
* Tincture: This word refers to a solution of a substance in alcohol. It comes from the Latin "tinctura," meaning "coloring" or "staining." The "ti" here is part of the root "tinct."
* Titanium dioxide: This is a white pigment used in paints and sunscreen. The "ti" in this word is again related to the element titanium.
Without a specific word in mind, it's impossible to give a precise meaning to "ti." If you can provide the whole word, I can help you decipher its meaning.