sthe·ni·a 
(sthə-nīə, sthēnē-ə)
(sthə-nīə, sthēnē-ə)n.
A condition of bodily strength, vigor, or vitality.
[New Latin, from Greek sthenos, strength; see segh- in the Appendix of Indo-European roots.]
- transactivator
- transactor
- Trans Alai
- transalpine
- Transalpine Gaul
- transaminase
- transamination
- Transantarctic Mountains
- transatlantic
- transaxle
- Transcaucasia
- Transcaucasian
- transceiver
- transcend
- transcendence
- transcendency
- transcendent
- deftly
- deftness
- defuel
- defunct
- defunctive
- defunctness
- defund
- defuse