however
[adverb]
Synonyms: nevertheless, after all, anyhow, but, nonetheless, notwithstanding, still, though, yet

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Related Idioms: all the same, be that as it may, for all that, on the other hand

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English Thesaurus: but, although, however, nevertheless/nonetheless, whereas, ...

[TahlilGaran] English Synonym Dictionary ▲

I. how‧ev‧er¹ S1 W1 /haʊˈevə $ -ər/ adverb

1. used when you are adding a fact or piece of information that seems surprising, or seems very different from what you have just said Synonym : nevertheless:
This is a cheap and simple process. However, there are dangers.
an extremely unpleasant disease that is, however, easy to treat

2. used to say that it does not matter how big, good, serious etc something is because it will not change a situation in any way Synonym : no matter how:
You should report any incident, however minor it is.
We have to finish, however long it takes.
however much/many
I really want the car, however much it costs.

3. especially British English used to show surprise when you ask how something happens or how someone does something:
However did he get that job?

[TahlilGaran] Dictionary of Contemporary English ▲

II. however² conjunction
in whatever way:
You can do it however you like.
If we win the match, we’ll be delighted, however it happens.
However you look at it, it was a wicked thing to do.

[TahlilGaran] Dictionary of Contemporary English ▲

however
conjunction
BAD: I don't like shopping however I'll come with you.
GOOD: I don't like shopping but I'll come with you.

Usage Note:
Unlike but, however is an adverb (NOT a conjunction) and is used only in formal styles: 'I was hoping to deal with this matter quickly. However, the situation is more complicated than I thought.' 'The newspapers always carried stories of new advances and glorious victories. In reality, however, the war was not going well.'
See also NEVERTHELESS (nevertheless), THEREFORE 1 (therefore)

[TahlilGaran] Dictionary of Common Errors ▲

but conjunction used when linking two words or phrases that seem opposite or very different in meaning. Don’t use but at the beginning of a sentence in written English:
The plant’s leaves are big, but its flowers are quite small.
Her books are fascinating but often rather disturbing.
Many French dishes are basically simple, but they can take a long time to prepare.
Most of us value human life, but but some people think of animals as being equally important.
although conjunction used when contrasting one clause with another in the same sentence:
Although you are in the middle of the city, you feel as if you are in the countryside.
The windmill is still in good working order, although it has not been used since the 1950s.
I enjoyed German although I wasn’t very good at it.
Although lack of sleep causes some problems, it has a relatively small effect on performance at work.
however conjunction used when saying something that seems different or surprising after your previous statement. It is usually used in the middle of a sentence, separated from the rest of the sentence by commas. It can also come at the beginning:
Jack and his family managed to escape before the soldiers arrived. Other families in the village, however, were less lucky.
Their economy was incredibly successful in the 1980s. Since then, however, there has been a big rise in unemployment.
The town is a long way from the nearest big city. However, there is a good bus service.
He began his academic career as a mathematician. However, his main achievements were in the field of nuclear physics.
nevertheless/nonetheless conjunction used when saying something that seems different or surprising after your previous statement. It is used at the beginning or end of a sentence:
A series of studies 20 years ago suggested that there was a link between watching violent films and violent behaviour. Nevertheless, the results remain highly controversial.
It was certainly a terrible accident. Nevertheless, air travel is still the safest form of transport.
The weather turned bad early in the day, but the festival was a great success nonetheless.
It was very hard digging in the dry ground, but the work was satisfying nevertheless.
whereas /weərˈæz/
/while conjunction used when making comparisons and saying that something is true of one person, thing, or situation, but it is different for another. They are used when contrasting one clause with another in the same sentence:
Taxes make up 62% of the price of a litre of petrol in France, whereas in Britain, the tax is 75%.
Some people visit their doctor once every few weeks, while others may not visit a doctor for several years.
Whereas in most of the world they drive on the right, in the UK and Japan they drive on the left.
by contrast formal used when making comparisons and saying that a person, thing, or situation is very different from the one you have just mentioned. It is used when referring back to the previous sentence:
The surface temperature on Venus is higher than the boiling point of water. Mars, by contrast, is very cold.
A report by the FBI shows that 26% of female murder victims in 1995 were killed by their husbands or boyfriends. By contrast, only 3% of male victims were killed by their wives or girlfriends.

[TahlilGaran] English Thesaurus ▲