wakefully

/ˈweɪkfəli/
adverb
  1. In a watchful, alert, or vigilant manner; with careful attention.
    • She listened wakefully to the strange noises coming from the attic.
    • The guard stood wakefully at the gate, scanning the horizon for any movement.
    • The cat sat wakefully on the windowsill, watching the birds in the garden.
Antonyms