rappel

noun
1
an act of going down a steep cliff or rock while attached to a rope, pushing against the slope or rock with your feet
فرود با طناب, رَپِل, فرود از صخره
verb
1
to go down a steep cliff or rock while attached to a rope, pushing against the slope or rock with your feet
فرود آمدن با طناب, فرود فنی