unobservable
/ˌʌnəbˈzɜrvəbəl/
adjective
- Not able to be seen, noticed, or detected.
- Some particles are unobservable even with powerful microscopes.
- The effect of the drug on mood was subtle and nearly unobservable.
- Dark matter is unobservable directly, but scientists infer its existence from gravity.
Synonyms
Antonyms