(nreverse LIST)
(setq cell '("value1" "value2" "value3" "value4"))
(nreverse cell) #=> ("value4" "value3" "value2" "value1")
cell #=> ("value1")
(setq cell '("value1" "value2" "value3" "value4"))
(setq cell (nreverse cell)) #=> ("value4" "value3" "value2" "value1")
cell => ("value4" "value3" "value2" "value1")