reef

Reef has 1 syllable.

noun. A rocky region in the southern Transvaal in northeastern South Africa; contains rich gold deposits and coal and manganese.

noun. A submerged ridge of rock or coral near the surface of the water.

verb. Lower and bring partially inboard.

noun. One of several strips across a sail that can be taken in or rolled up to lessen the area of the sail that is exposed to the wind.