/
ˈtransɪənt, 
ˈtrɑːns-, 
-nz-/
adj.
  - lasting only for a short time.
 - staying or working in a place for a short time only.
 
n.
  - a transient person.
 - a momentary variation in current, voltage, or frequency.
 
Derivative
- transience n.
  - transiency n.
  - transiently adv.
 
Etymology
C16: from L. transient-, transire ‘go across’.