acute

uh-KYOOT

meaning in plain English

A person who is having a strong or sudden episode of a mental illness.

Think acute as a sudden lightning‑strike mind—sharp, intense, a mental episode that hits fast.

for example

The nurse told the family that the acute was responding well to the new medication.

When a mental illness flares up quickly and intensely, the person experiencing it is called an acute. Imagine a friend who suddenly starts hearing voices and needs extra care—that friend would be an acute.