ahoy
Synonym discussion
Sense: exclamation/1
Unlike 'hello', which is a neutral everyday greeting used in any situation, 'ahoy' belongs almost exclusively to nautical contexts and is rarely used in daily conversation. 'Hey' is much more common and informal, used to grab someone's attention on land or in casual settings, but it lacks the traditional maritime atmosphere of 'ahoy.' 'Yo' is very informal slang, often used among young people or in urban contexts, and would sound out of place on a boat. If you are writing a story set at sea or trying to sound like an old-fashioned sailor, 'ahoy' creates the right tone; in a normal office or street setting, use 'hello' or 'hey' instead.
Common collocations
Etymology
The word 'ahoy' comes from the Dutch greeting 'hoi', which means 'hello'. English sailors picked it up during the 14th and 15th centuries through close contact with Dutch ships and ports. The form 'ahoy' was first recorded in English around 1750 and quickly became the standard way to hail another vessel at sea. The unrelated word 'hoy' (a type of small coastal sailing ship) may have influenced its spread.