The goalkeeper lunged in a single bound and caught the ball.
Tips
usage
Almost always used in the pattern 一个箭步 + verb of motion (冲, 扑, 跨, 跃) to describe one explosive forward stride. Don't say 走箭步 — it's a stride taken, not walked.
memory
箭 means 'arrow' — picture stepping as fast as an arrow flies.
