Ahead
来自Big Physics
Safin（讨论 | 贡献）2022年4月26日 (二) 22:56的版本 （建立内容为“Category:etymology == google == [https://www.google.com.hk/search?q=ahead+etymology&newwindow=1&hl=en ref] mid 16th century (originally in nautical use): fro…”的新页面）
mid 16th century (originally in nautical use): from a-2 ‘in, at’ + head.
wiktionary
a- + head. Perhaps originally a nautical term, "beyond the head (of a ship)", then drifting into more general English usage where it is used to describe something as being "in front of".
etymonline
ahead (adv.)
1620s, "at the head, in front," from a- "on" (see a- (1)) + head (n.) "front." Originally nautical (opposed to astern). Meaning "forward, onward" (the sense in go ahead) is from 1640s. To be ahead of (one's) time attested by 1837.
