diagonal的词源
英文词源
- diagonal
- diagonal: [16] Diagonal is commonly used simply as a synonym for oblique, but in strict mathematical terms it denotes a line joining two non-adjacent angles of a polygon. This reveals far more clearly its origins. It comes from diagōnālis, a Latin adjective derived from Greek diagónios. This was a compound formed from the prefix dia- ‘across’ and gōníā ‘angle’ (as in English polygon), meaning ‘from angle to angle’. Gōníā is related ultimately to English knee and genuine.
=> genuine, knee, polygon - diagonal (adj.)
- 1540s (implied in diagonally), from Middle French diagonal, from Latin diagonalis, from diagonus "slanting line," from Greek diagonios "from angle to angle," from dia- "across" (see dia-) + gonia "angle" (see -gon). As a noun, from 1570s.
中文词源
dia-, 穿过。-gon, 弯，角，词源同knee, octagonal. 即穿过去的，成对角的。
该词的英语词源请访问趣词词源英文版：diagonal 词源，diagonal 含义。
词根词缀： dia-通过,横过 + -gon-角 + -al名词词尾
