* Ex-: This prefix often indicates something that has happened in the past, implying experience, but it's not always used in this way. For example, "experienced" could be used with "ex-soldier" to mean someone who has served in the military and gained experience.
* Veteran-: This term specifically refers to someone with extensive experience, especially in military service.
* Seasoned-: This implies experience gained over time, suggesting maturity and expertise.
* Skilled-: This emphasizes the ability and knowledge acquired through experience.
Ultimately, the best prefix will depend on the specific situation and the desired nuance.