architecture A slender upright spire at the top of a buttress of tower.

Dutch: toppunt, pinakel
Polish: pinakiel, fiala, sterczyna

The highest level or degree attainable; the highest stage of development:
— ...catapulted Einstein to the pinnacle of fame.

synonyms: acme, elevation, height, meridian, peak, summit, superlative, tiptop, top.

Roget 210: summit, summity^†; top, peak, vertex, apex, zenith, pinnacle, acme, culmination, meridian, utmost height, ne plus utra, height, pitch, maximum, climax, culminating point, crowning point, turning point; turn of the tide, fountain head; water shed, water parting; sky, pole.    tip, tip top; crest, crow's nest, cap, truck, nib; end etc. 67; crown, brow; head, nob^†, noddle^†, pate; capsheaf^†.    high places, heights.    topgallant mast, sky scraper; quarter deck, hurricane deck.    architrave, frieze, cornice, coping stone, zoophorus^†, capital, epistyle^†, sconce, pediment, entablature^†; tympanum; ceiling etc. (covering) 223.    attic, loft, garret, house top, upper story.    [metaphorical use] summit conference, summit; peak of achievement, peak of performance; peaks and troughs, peaks and valleys (in graphs). ... show more

Dutch: overtreffende trap, spits, hoogtepunt, toppunt, top
Polish: kulminacja

A lofty peak.

Surmount with a pinnacle.

Raise on or as if on a pinnacle.