late 14c., "covered with gravel or sand," from gravel + -y (2). Of voices, by 1943.
Entries linking to gravelly
gravel n.
"stone in small, irregular fragments," early 13c., from Old French gravele "sand, gravel; sea-shore; sandy bed of a river," diminutive of grave "sand, seashore" (Modern French grève), possibly from Celtic *graw- (compare Welsh gro "coarse gravel," Breton grouan, Cornish grow "gravel"), perhaps ultimately from PIE *ghreu- "to rub, grind" (see grit (n.)). Gravel-crusher was World War I slang for "infantryman."
-y 2
adjective suffix, "full of or characterized by," from Old English -ig, from Proto-Germanic *-iga- (source also of Dutch, Danish, German -ig, Gothic -egs), from PIE -(i)ko-, adjectival suffix, cognate with elements in Greek -ikos, Latin -icus (see -ic). Originally added to nouns in Old English; used from 13c. with verbs, and by 15c. even with other adjectives (for example crispy). Adjectives such as hugy, vasty are artificial words that exist for the sake of poetical metrics.