puzzling

/ˈpʌzəlɪŋ/
adjective
  1. Difficult to understand or explain; causing confusion.
    • Scientists found the ancient artifact's purpose puzzling.
    • It is puzzling why the computer keeps crashing for no reason.
    • The sudden change in her behavior was puzzling to her friends.
Antonyms
What does "puzzling" mean? | whatsthatwordmean | whatsthatwordmean