Racial
来自Big Physics
late Old English, from Old Norse rás ‘current’. It was originally a northern English word with the sense ‘rapid forward movement’, which gave rise to the senses ‘contest of speed’ (early 16th century) and ‘channel, path’ (i.e. the space traversed). The verb dates from the late 15th century.
wiktionary
1862, race + -ial.
etymonline
racial (adj.)
"relating, pertaining to, or characteristic of an ethnic race or race generally," 1862, from race (n.2) + -ial. "A word of considerable frequency in the 20th century" [OED]. Related: Racially.
