steep sided

/stipˈsaɪdɪd/
adjective
  1. Having sides that rise or fall at a sharp angle; very steep.
    • We camped at the bottom of a steep-sided valley.
    • The hikers carefully climbed the steep-sided mountain.
    • The canyon was steep-sided, making it difficult to climb out.
Antonyms
What does "steep sided" mean? | whatsthatwordmean | whatsthatwordmean