Pronunciation: [ɪn flˈaʃ] (IPA) 
The phrase "in flash" is spelled as /ɪn flæʃ/. The first sound is the short "i" sound, followed by the "n" sound. The next sound is the "f" sound, followed by the "l" sound. The "a" sound in "flash" is pronounced as /æ/, followed by the "sh" sound which is pronounced as /ʃ/. When put together, the phrase means something that happens quickly, with immediacy or without any delay.
The phrase "in flash" refers to the concept of performing an action or an event quickly or instantaneously. It is an expression used to describe activities or occurrences that happen without delay or hesitation, typically in a brief and sudden manner.
When something happens "in flash," it means that it transpires rapidly and abruptly, almost as if it occurred without warning. The phrase often implies a sense of speed, efficiency, and immediacy in carrying out a task or completing an action. It suggests that there is no compromise in terms of timeliness or swiftness when executing a particular activity.
For instance, if someone says, "He completed the project in flash," it indicates that the individual finished the task swiftly and efficiently, without any unnecessary delays. Similarly, if there is a sudden burst of lightning during a storm, it can be described as a flash of lightning, as it appears and disappears rapidly.
Overall, "in flash" revolves around the concept of things happening swiftly, unexpectedly, and without delay. It highlights the rapidity of an action or event, emphasizing that it occurs with immediate speed and without wasting any time.
The phrase "in a flash" or simply "in flash" has its roots in early English and Latin origins.
The word "flash" can be traced back to the Old English word "flæsc", which meant "a sudden burst or outburst". This term evolved through Middle English and eventually became the word "flash" in modern English, referring to a sudden burst of light or an instantaneous event.
The use of "in flash" as an idiomatic expression likely originated from the idea of something happening quickly, instantaneously, or in an instant. This phrase was first documented in the late 18th century, describing a rapid occurrence or action that took place almost immediately.
Overall, the etymology of "in flash" highlights how the word "flash" has been associated with suddenness and swiftness, leading to the expression's meaning of something happening quickly or in an instant.
