the.com/highest
The peak no other peak can look down on.
means The superlative of high, marking the greatest point in height, rank, degree, or intensity.
from Old English heahost, the superlative of heah (high), kin to German hoch and the universal urge to point upward at whatever wins.
GrammarSuperlative degree: high, higher, highest, done.
IdiomOn high means heaven, not merely elevation.
StackingMost highest is grammar climbing a ladder twice.