1) Canaliculate 2) Corrugated 3) Grooved 4) Having grooves 5) Hollowed out in grooves 6) Rutted 7) Rutty 8) Wrinkled 9) Wrinkly Found on https://www.crosswordclues.com/clue/furrowed
adjective having long narrow shallow depressions (as grooves or wrinkles) in the surface; `furrowed fields`; `his furrowed face lit by a warming smile` Found on https://www.encyclo.co.uk/local/20974