1. past tense of hark; listened attentively
Usage: archaic or literary
2. past tense of hark back; referred to or recalled something from the past

Examples

• She harked to the sound of footsteps in the hallway.
• The old man harked back to his days in the military.
• The design harked back to Victorian architecture.
• He harked back to simpler times when discussing modern problems.
• The melody harked back to traditional folk songs.
• They harked to the warning bells in the distance.