A jagged mountain range or chain of peaks, especially one with a saw-toothed profile. Also used as a phonetic alphabet designation for the letter 'S'.
From Spanish 'sierra' meaning 'saw' or 'mountain range', derived from Latin 'serra' meaning saw. The geographical term arose because mountain ridges resemble the teeth of a saw when viewed from a distance.
Sierra perfectly captures how languages adapt to describe landscapes - Spanish speakers looked at jagged mountain peaks and saw saw teeth! This word is now globally recognized through places like Sierra Nevada (snowy saw) and the NATO phonetic alphabet, showing how geographical terms can transcend their origins.
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