coastline
UK[ˈkəʊstlaɪn]US[ˈkoʊstlaɪn]
n
the outline of a coast, especially as seen from the sea, or the land that lies along it
Morpheme Breakdown
coast
line
coast
shore
line
mark
Etymology
the word 'coastline' is a transparent compound formed within english from two nouns of latin origin. the first element, 'coast', derives from latin costa, which originally meant 'rib' or 'side', a sense that extended metaphorically to the 'side' or 'edge' of the land. the second element, 'line', originates from latin linea, referring to a linen thread or a drawn mark, which evolved to signify any linear boundary or contour. when combined, the term literally means 'the boundary line of the coast', creating a precise geographical term that visually conceptualizes the meeting point of land and sea as a definable contour.
Analysis
Structure: coast (shore) + line (mark)
coast: from latin costa (rib, side, flank), via old french coste. in this word, it functions as the base noun meaning the land beside the sea.
line: from latin linea (linen thread, string, mark), via old french ligne. in this word, it functions as a noun-forming element denoting a long, thin mark or boundary.
Examples
the rugged coastline of scotland is famous for its dramatic cliffs and inlets.
erosion is causing the coastline to recede by several feet each year.
from the airplane window, we could see the entire coastline illuminated by the setting sun.