observing

/əbˈzɜrvɪŋ/
adjective
  1. Paying close attention to details; watchful.
    • The observing detective noticed a tiny clue at the crime scene.
    • She is very observing and always remembers people's names.
    • An observing student can learn a lot just by watching the teacher.
Antonyms
noun
  1. The act of watching something or someone carefully.
    • Observing the birds in the park is a relaxing hobby.
    • The scientist's observing of the experiment lasted for hours.
    • Careful observing of traffic rules keeps everyone safe.