"scabrous : Covered with scales or scabs; hence, very coarse or rough. (figuratively) Disgusting,..."

“scabrous : Covered with scales or scabs; hence, very coarse or rough.
(figuratively) Disgusting, repellent, repulsive, vile.
(figuratively) Of music, writing, etc.: lacking refinement, harsh, rough; unmelodious, unmusical.
(figuratively) Difficult, thorny, troublesome.
(figuratively, chiefly US) Covered with a crust of dirt or grime.”

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