Here's how it typically works:
* "tain" often combines with other word parts to create verbs: "tain" usually signifies *holding*, *keeping*, or *maintaining*.
* Examples:
* Contain: To hold within (to hold something inside)
* Maintain: To keep something in a good state; to uphold
* Obtain: To get or acquire something
* Retain: To keep or hold onto something
The meaning of "tain" is influenced by the other parts of the word it's combined with. It's not something you'd find as a standalone word in the English language.