What is the suffix for submarine?

There isn't a specific suffix for "submarine". It's a complete word on its own.

However, there are some related words that use suffixes:

* Submersible: This word uses the suffix "-ible" to mean "capable of being submerged".

* Submerged: This word uses the suffix "-ed" to mean "covered with water".

Let me know if you have any other questions!