Vertical
来自Big Physics
mid 16th century (in the sense ‘directly overhead’): from French, or from late Latin verticalis, from vertex (see vertex).
wiktionary
Borrowed from Middle French vertical, from Late Latin verticālis.
etymonline
vertical (adj.)
1550s, "of or at the vertex, directly overhead," from French vertical (1540s), from Late Latin verticalis "overhead," from Latin vertex (genitive verticis) "highest point" (see vertex). Meaning "straight up and down" is first recorded 1704. As a noun meaning "the vertical position or line" from 1834. Related: Vertically.
