Scabrous means rough to the touch, or indecent in subject. A scabrous surface, scabrous humour, a scabrous tale.
The physical sense is technical and belongs to botany and geology, where a scabrous leaf is rough with tiny points. The second sense is the one most readers meet: scabrous humour is coarse and faintly disreputable, though never quite obscene.
1adjectivescabrousRough to the touch, or indecent in subject.
“The magazine printed scabrous gossip about the private lives of politicians.”
scabrous is a quality.
Latin scaber means rough or scaly, from scabere, to scratch. Scab and scabies are relatives.
Proto-Indo-European
*skabʰ- — to scratch
Latin
scaber — scabrous, rough; scabby, mangy, itchy
English, today
scabrous
Built from
Latin scaber (“scabrous, rough; scabby, mangy, itchy”) (from scabō (“to scratch, scrape, abrade”), from Proto-Indo-European skabʰ- (“to scratch”)) + English -ous; compare French scabreux, Latin scabrōsus.
Etymology from Wiktionary, CC BY-SA