Как по Английски будет грот-мачта

adjective

Chief in size or importance.

Примеры использования:

A main road

noun

A principal pipe carrying water or gas to buildings, or taking sewage from them.

Примеры использования:

A faulty gas main

proper noun

A river of south-western germany which rises in northern bavaria and flows 500 km (310 miles) westwards, through frankfurt, to meet the river rhine at mainz.

noun

The principal mast of a ship, typically the second mast in a sailing ship of three or more masts.

Примеры использования:

He saw how close to the mainmast the commodore was and grinned suddenly.

noun

A platform around the head of the lower section of a sailing ship's mainmast.

Примеры использования:

It was a horrible lesson too to them, because it was afterwards found that he had taken up a bottle…