verb / interjection
hark
HARK/hɑːrk/
To listen closely to a sound.
Hark! Someone is knocking faintly at the door.

Etymology
Hark may be an intensified relative of hear, but that ancestry is uncertain. Its use as a hunting cry illustrates its role in calling for close attention.
In context
“Hark, my lord!” said he to Sir Robert. “Is there not a sound in the fog?” They both listened together with sidelong heads.
More examples
- Hark to the bells ringing across the valley.
- “Hark!” she whispers as footsteps echo in the hallway.
- Hark! Is that someone knocking at the door?
Forms
hark · harks · harked · harking