protrude

This verb describes a physical displacement where an object breaks the plane of a surface. It carries a sense of abruptness or irregularity, often implying that the extension is unexpected, obstructive, or visually prominent. It is typically used in technical, medical, or descriptive contexts to highlight a structural anomaly. While similar to "extend," this word specifically emphasizes the act of sticking out from a boundary rather than simply increasing in length. It often suggests a certain degree of tension or pressure, such as a bone pushing through skin or a nail sticking out from a board.