[rap.pel] vi -pelled also -peled ; -pel.ling also -pel.ing [F, lit., recall, fr. OF rapel, fr. rapeler to recall, fr. re- + apeler to appeal, call--more at appeal] (1944): to descend (as from a cliff) by sliding down a rope passed under one thigh, across the body, and over the opposite shoulder or through a special friction device -- rappel n
RAPPEL
Meaning of RAPPEL in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012