tri·une 
(trīyn′)
(trīyn′)adj.
Being three in one. Used especially of the Christian Trinity.
n.
A trinity.
[TRI- + Latin ūnus, one; see oi-no- in the Appendix of Indo-European roots.]
- submerse
- submersed
- submersible
- submersion
- submicroscopic
- submicroscopically
- submillimeter radiation
- subminiature
- subminiaturization
- subminiaturize
- subminimum wage
- submiss
- submission
- submissive
- submissively
- submissiveness
- submit
- submittal
- submitter
- submontane
- submucosa
- submucosal
- submucosally
- submultiple
- subnet