Picture a boat with its nose pointed straight at the harbour, while a side wind quietly pushes it off that line. The sideways gap between where the boat points and where it actually goes is the leeway. Every other use keeps that gap: sometimes the gap is welcome room to move, and sometimes it is ground you have lost and have to win back.
From the word’s history
The packet's Wiktionary entry derives leeway from lee, the side of a ship away from the wind, plus way. So the word literally names the path taken toward the sheltered side, which is the sideways drift itself.
封包裡的 Wiktionary 記錄說 leeway 由 lee 加 way 組成。lee 指船上背風的那一側，way 是走的路。字面上就是「往背風那邊走掉的路」，也就是被風推開的那段偏移，正好是今天各種用法共同的起點。
Wiktionary entry supplied in packet, source_ref kaikki:3f6f69a190036ae4:564544290:16986, etymology_text: From lee ("side away from the wind") + way.
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