downward-sloping

The compound adjective 'downward-sloping' is a modern English formation that transparently combines two directional and descriptive elements. 'Downward' originates from Old English 'dūn', meaning a hill or elevated ground, combined with the directional suffix '-weard', literally meaning "toward the hill" or "in a descending direction." 'Sloping' derives from the verb 'slope', which entered English in the 16th century, likely related to the concept of slipping or slanting. When combined, the morphemes create a literal, descriptive term for a line or surface that inclines in a descending direction, a logical and visual concept directly built from its constituent parts.

Structure: downward (downwards) + sloping (sloping) - downward: From Old English 'dūn' (hill, down) + '-weard' (suffix denoting direction). Functional role: Adverb/Adjective base indicating direction. - sloping: From the verb 'slope', of uncertain origin, possibly from Old English 'āslūpan' (to slip away) + '-ing' (suffix forming present participle/adjective). Functional role: Present participle/adjective describing an angle or incline.