erratic

US /ɪˈræt̬.ɪk/
UK /ɪˈræt̬.ɪk/
"erratic" picture
1.

erratique, irrégulier, imprévisible

not regular or consistent in movement, behavior, or quality

:
His breathing was shallow and erratic.
Sa respiration était superficielle et irrégulière.
The car's engine was making erratic noises.
Le moteur de la voiture faisait des bruits irréguliers.