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say it: PIN-uh-kuhl
pinnacle is a noun and verb meaning "(architecture) a slender upright spire at the top of a buttress of tower". It carries 5 recorded senses.
the highest level or degree attainable; the highest stage of development
“his landscapes were deemed the acme of beauty”
“the artist's gifts are at their acme”
“at the height of her career”
“the peak of perfection”
“summer was at its peak”
“...catapulted Einstein to the pinnacle of fame”
“the summit of his ambition”
“so many highest superlatives achieved by man”
“at the top of his profession”
a lofty peak
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for pinnacle come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.