らんよう乱用ran'youらんよう濫用ran'youらんranよう用you
1.
The act of using something in a way that goes beyond acceptable limits or standards, often in a careless or irresponsible manner.
2.
The improper or excessive utilization of power, privileges, or resources, typically resulting in harm or injustice to others.
3.
A behavior that involves taking advantage of a position or resource, disregarding rules or ethical considerations for personal gain.
Example:
彼は特権を乱用したに違いない。