noun. ['ˈpɪnəkəl'] (architecture) a slender upright spire at the top of a buttress of tower.
verb. ['ˈpɪnəkəl'] raise on or as if on a pinnacle.
verb. ['ˈpɪnəkəl'] surmount with a pinnacle.
noun. ['ˈpɪnəkəl'] a lofty peak.
noun. ['ˈpɪnəkəl'] the highest level or degree attainable; the highest stage of development.