out of control; uncontrollable
Describes a situation, machine, emotion, or system that cannot be controlled or managed. Often used in technical, mechanical, or emotional contexts.
The machine went out of control.
His anger was uncontrollable.
More colloquial and often used for people or situations that are beyond one's ability to handle, while 制御不能 is more formal and often used for mechanical or systemic loss of control.
Compound of 制御 (control) and 不能 (impossible, incapable). The exact historical derivation is uncertain, but the meaning is transparent from its components.