ridged
adjective
[ rɪdʒd ]
• marked with or formed into narrow raised bands.
• "the ridged sand of the beach"
ridge
verb
• mark with or form into narrow raised bands.
• "a field ploughed in narrow stretches that are ridged up slightly"
Origin:
Old English hrycg ‘spine, crest’, of Germanic origin; related to Dutch rug and German Rücken ‘back’.