whicheverwhich‧ev‧er /wɪtʃˈevə $ -ˈevər/ ●●○ determiner, pronoun 
It will be a difficult operation, whichever method you choose. Whichever way you look at it, things are pretty bad.2used to refer to the member of a group of people or things that does something, is wanted, is possible etc: Whichever player scores the highest number of points will be the winner. You can either have the double room or the family room, whichever you want. ‘Do you want tea or coffee?’ ‘I don’t mind – whichever one you’re making.’
Longman Language Activatorto shake your head as a way of saying no
use this when you want to make it clear that nothing will change a situation, your intention etc: no matter how much/many: · I'm determined to go to New York, no matter how much it costs.no matter what/who/when etc: · Paul always calls me every day, no matter where he is.· No matter what position he plays, he'll be a great asset to the team.no matter how good/small/hot etc: · I never win, no matter how hard I try.· Dad was determined to get to the truth, no matter how long it took.
use this when the fact that something is very big, good etc does not change a situation: however much/many: · However much I try, I just don't understand him at all.however however adj/adv: · I could never watch any movie more than once, however good it is.· Each one of us, however old or however young, is a valuable member of society.
used when it is not important what happens, who does something etc, because it does not change the situation or your intention: · "I don't care," Carrie cried, "whatever anyone says!"· We can take a taxi or the bus, whichever comes first.· He's a capable man. I'm sure he can deal with whatever problems arise.· Don't forget, it's your job to support your leader, whoever it is.whichever of somebody/something: · Whichever of the cars you choose, I'm sure you'll be very pleased.
use this when what is done is not affected by different situations, problems etc: regardless of: · The rate of contribution to the pension plan is the same for all employees, regardless of age.regardless of whether/what/who etc: · Many people stick with their banks regardless of whether they offer the best deal.carry on/continue regardless: · It may rain by the end of the day, but we plan to carry on regardless.
use this when the same thing happens in every case without being affected by facts such as age, size, time, or position: · The job is open to anyone with the right qualifications, irrespective of their age.· Justice for all, irrespective of race or class, is everyone's right.irrespective of what/where/who etc: · All children should have access to the latest technology, irrespective of where they live or how much their parents earn.
use this to say that something should be ignored because it does not affect the situation or your intention: never mind that!: · "How do you know so much about Jake anyway?" "Never mind that!"never mind something: · I want this wedding to be perfect, never mind the cost.never mind what/why/when etc: · Never mind what Jalal says, Peter is a trusted member of our community.never mind that: · Never mind that it's late. I need to talk to you now.
use this when you are determined to do something whatever happens: · I'll be there come what may. I promise.· Some people are getting out of the country fast, but my cousin's family has decided to stay, come what may.
COLLOCATIONS FROM THE ENTRY ‘Do you want tea or coffee?’ ‘I don’t mind – whichever one you’re making.’
1used to say that it does not matter which thing or person is chosen because the result will be the same: ‘Do you want tea or coffee?’ ‘I don’t mind – whichever one you’re making.’ It will be a difficult operation, whichever method you choose. Whichever way you look at it, things are pretty bad.2used to refer to the member of a group of people or things that does something, is wanted, is possible etc: Whichever player scores the highest number of points will be the winner. You can either have the double room or the family room, whichever you want. ‘Do you want tea or coffee?’ ‘I don’t mind – whichever one you’re making.’