A promontory is a high, rocky cliff jutting into a body of water. A promontory is just the kind of thing a heroine will threaten to throw herself off of if the love of her life does not return to her.

A promontory can be a foreland, headland, or rocky cliff. Think Ireland’s Cliffs of Moher jutting into the sea. Connect promontory with prominent, "important or sticking out," project, "estimate forward" and protrude, "stick out," which also carry this sense of jutting out. In anatomy, promontory can refer to a projecting part of the body.

Definitions of promontory
  1. noun
    a natural elevation (especially a rocky one that juts out into the sea)
    synonyms: foreland, head, headland
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    Cape Horn
    a rocky headland belonging to Chile at the southernmost tip of South America (south of Tierra del Fuego)
    Rock of Gibraltar
    location of a colony of the United Kingdom on a limestone promontory at the southern tip of Spain; strategically important because it can control the entrance of ships into the Mediterranean; one of the Pillars of Hercules
    Cape Hatteras
    a promontory on Hatteras Island off the Atlantic coast of North Carolina
    Cape Canaveral
    a sandy promontory (formerly Cape Kennedy) extending into the Atlantic Ocean from a barrier island off the eastern coast of Florida; the site of a NASA center for spaceflight
    Cape Sable
    a promontory on the far southern part of Nova Scotia
    Jebel Musa
    a promontory in northern Morocco opposite the Rock of Gibraltar; one of the Pillars of Hercules
    a term used in Scottish names of promontories
    a promontory extending out into a large body of water
    type of:
    elevation, eminence, natural elevation
    a raised or elevated geological formation
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