The Chinese word "凿壁偷光" is formed by sequentially combining the characters 凿 (meaning to bore or chisel), 壁 (wall), 偷 (to steal), and 光 (light), which together literally describe the action of boring a hole in a wall to steal light; this phrase originates from a historical anecdote where a scholar performed this act to study, and its formation directly depicts that specific sequence of events.