IPA: /səˈplæntər/
KK: /səˈplæntər/
A person or thing that takes the place of another, often by force or scheming.
The new manager was seen as a supplanter of the previous leadership.
Supplanter → It is formed from "sub-" (meaning under) and "plantare" (meaning to plant). The word describes someone who plants themselves under another, often to take their place or position.
Think of someone 'planting' themselves 'under' another person to take their position — that's what a supplanter does.