elusive

/ɪˈlusɪv/
adjective
  1. Difficult to find, catch, or achieve.
    • The elusive butterfly fluttered away before I could take a photo.
    • Scientists have been searching for the elusive cure for the common cold for decades.
    • A good night's sleep has been elusive for the new parents.
  2. Difficult to remember or describe; hard to pin down.
    • The meaning of the poem was elusive, leaving each reader with a different interpretation.
    • She had an elusive quality that made her seem mysterious to her friends.
    • The answer to the riddle remained elusive, even after hours of thinking.
Antonyms
What does "elusive" mean? | whatsthatwordmean | whatsthatwordmean