Unnoticeable (adjective)

Not able to be noticed or seen.

Origin:

The word "unnoticeable" is formed by the prefix "un-" which means not, and the word "noticeable" which means able to be noticed or seen. together they form an adjective that means not able to be noticed or seen.

Examples:

1. The change in his appearance was unnoticeable, I couldn't tell he had a haircut.
2. The difference in temperature was unnoticeable, I couldn't tell if it was colder or warmer.
3. The improvement in his grades was unnoticeable, I couldn't tell he had been studying.
4. The sound of the car passing by was unnoticeable, I couldn't tell it had passed.
5. The error in the document was unnoticeable, I couldn't tell it was incorrect.