An inverted bow is a boat's bow whose most forward point is at or below the waterline. This design maximizes the length of waterline, reducing drag and improving speed.
Image #1: By Rama, CC BY-SA 3.0 fr, https://commons.wikimedia.org/w/index.php?curid=61550876. Image #2: By User:MatthiasKabel - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=21373372