The phrase "a swiftly expanding" is correct and usable in written English.
It can be used to describe something that is growing or increasing rapidly, often in contexts related to business, technology, or populations.
Example: "The company is part of a swiftly expanding market that shows no signs of slowing down."
Alternatives: "a rapidly growing" or "a fast-expanding".
Outwardly, with a swiftly expanding economy and a rapidly modernizing infrastructure, everything was going well in Iran.
In spite of great challenges including the lengthy and costly war, a swiftly expanding population, and the strictures of a U.S. sanctions program Mousavi managed to control inflation and ensure the reliable availability of essential items.
Shortly after the Deepwater Horizon exploded, the Coast Guard and BP, following the National Contingency Plan and I.C.S., came together in a swiftly expanding structure known as the Unified Command.
A swiftly expanding burst of smoke and dust hid the rest of lower Manhattan; we saw the collapse of the second tower only on television, where the footage of hellbent airplane, exploding jet fuel, and imploding tower was played and replayed, much rehearsed moments from a nightmare ballet.
Asghedom's instinct – to monetize an exclusive, VIP experience that cannot be bootlegged like a Proud2Pay concert or novelty gift – is a swiftly expanding revenue stream in the music industry, which startups like Ground ctrl) and Bandpage are already capitalizing on by selling special artist packages like backstage tours and studio sessions.
Councillor Jonathan Rich said: "Barclays' decision to close such an important community facility in such a large and swiftly expanding area is a very disappointing one.
The United States is in a position to help by swiftly expanding resettlement and encouraging other donor states to follow its example.
Ladbrokes has been swiftly expanding its overseas operations, unveiling plans in 2006 to expand into Italy and Russia.
The Internet is perfectly suited to this overtly utilitarian and swiftly expanding world.
Voice-activated technology is swiftly expanding into retail channels and consulting firm Capgemini predicts that consumers will use voice technology for 18% of their total spending within three years (up from 3% now).
Grensen 8 (00 47 22 33 20 80, barejazz.no) Located in a 19th-century industrial zone now full of practice rooms and small music businesses, Blå started life 10 years ago as a jazz venue and swiftly expanded into a home for gigs and clubs of all types.
