How does the suffix ous change meaning of base word nerve in nervous?

The suffix "-ous" in "nervous" doesn't directly change the meaning of the base word "nerve". It adds a quality or state to the base word.

Here's how it works:

* Nerve: Refers to a bundle of fibers that transmits impulses to and from the brain. It can also be used metaphorically to describe courage or boldness.

* -ous: This suffix generally means "having the quality of" or "being characterized by".

Therefore, "nervous" means "being characterized by nerves". It implies a state of anxiety, worry, or tension.

In essence, "nervous" isn't about the physical nerve itself, but rather the emotional state that is often associated with the physical sensations caused by an excited or anxious nervous system.