Coastal
来自Big Physics
Middle English (in the sense ‘side of the body’), from Old French coste (noun), costeier (verb), from Latin costa ‘rib, flank, side’. coast (sense 1 of the noun) arose from the phrase coast of the sea ‘side of the sea’.
wiktionary
coast + -al
etymonline
coastal (adj.)
"of or pertaining to a coast or shore," 1872, from coast (n.) + -al (1). The proper Latin form costal is used only of ribs.
