edge

noun:the outer limit or border of a surface or area
- We sat on the edge of the pier and watched the boats.
noun:the sharpened side of a blade or cutting tool
- Be careful—the knife has a razor-sharp edge.
noun:a slight but decisive advantage in competition
- Her fluency gave her an edge in the interview.
noun:the verge or brink of a situation or event
- The team was on the edge of a breakthrough.
noun:a quality of intensity, boldness, or unsettling sharpness in tone or style
- The film’s dark humor adds an edge to the story.
noun:a state of nervous tension or irritability, often in the phrase on edge
- After the delays, everyone in the room was on edge.
verb:to move gradually or cautiously, often sideways
- She edged past the crowd to reach the exit.
verb:to change slightly in a given direction, usually with up or down
- Mortgage rates are edging down after last month’s spike.