predecessor
US /ˈpred.ə.ses.ɚ/
UK /ˈpred.ə.ses.ɚ/

1.
a person who held a job or office before the current holder
:
•
The new CEO is very different from his predecessor.
•
She inherited a strong team from her predecessor.
2.
a thing that has been followed or replaced by another
:
•
This model is a significant improvement over its predecessor.
•
The new software is much faster than its predecessor.