conj
whilst
wylst
conj
1
A more formal or British variant of "while", meaning during the same time or in contrast.
"Whilst I understand your concerns, I still think the plan should go ahead."
"She hummed to herself whilst tidying the shelves."
How to Use Whilst
Learner’s notesIn plain EnglishMeans exactly the same as "while" but sounds more formal or old-fashioned.
When to use it
Common in British English, especially in formal or literary writing; American English almost always uses "while" instead.
UK vs US
Chiefly British; rare in American English, where "while" is standard.
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_____ I understand your concerns, I still think the plan should go ahead.
Etymology
Built from Middle English whiles ("while", used adverbially) plus an added -t sound, a pattern also seen in words like "amongst" and "amidst".