Everybody knows about Vikings, the fearless warriors from the cold and barren north. People who have studied history (but not etymology) will tell you that Viking is an Old Norse word meaning 'pirate' or 'raider'. It's not.
The etymology of víkingr and víking is hotly debated by scholars. A víkingr was someone who went on expeditions, usually abroad, usually by sea, and usually in a group with other víkingar (the plural).
Both words are thought to be connected with Old Norse vík meaning 'fjord'', 'small bay', 'inlet' or 'cove'. Towns such as Reykjavik and Lerwick may trace their origins back to the Vikings. But it would be a step too far if one would decide that viking was named after a 'fjord'. Vikings were a diverse group and originated from the entire Scandinavian peninsular. We need another explanation.
The Swedes will tell you that vig means 'battle' and therefore a viking would be a 'warrior'. Not so.
Both wic in Old English and wick in Old Frisian meant ‘camp’ or ‘a temporary living space'. So, it's quite possible that, if vic means 'camp', then 'vikingr' could well mean '(one) going on a camping trip'.
As camps grew into more permanent settlements, the word vic also came to denote something different. We can discover the word in Old English wīc ('dwelling place', 'abode') and Middle English wik, wich ('village', 'hamlet', 'town'). Modern Dutch wijk and modern Frisian wyk still mean 'part of a city'.
This solution also ties in very neatly with the old Norse word vestrvíking. It is usually translated as 'raiding in the west', in the context of 'the British Isles'. Now we can give its original meaning 'camping in the west'.