Pronunciation: [wˈɒns ˈə͡ʊnli] (IPA) 
The spelling of "once only" is quite straightforward. "Once" is spelled with a silent "e" at the end, indicating a long "o" sound. The "o" is then followed by a "n" sound and a "s" sound. "Only" is spelled with a long "o" sound as well, represented by the letter "o" followed by the "n" sound, the "l" sound, and the "y" sound. The IPA transcription for this word is /wʌns ˈoʊnli/.
Once only refers to something that happens or is allowed to happen only one time. It implies that there will be no additional occurrences or repetitions of the event or action. The term "once" in this context indicates a singular instance or opportunity, while "only" emphasizes the exclusivity or uniqueness of that occurrence.
In various contexts, "once only" can have different meanings. For instance, in a limited-time offer or promotion, it suggests that the opportunity to take advantage of a particular deal or discount exists for a single occasion. It emphasizes the need to act promptly or miss out on the opportunity altogether.
In a procedural or legal context, "once only" may imply a requirement to follow a specific process or complete a certain task only once, without subsequent chances for correction or modification. This might apply to official forms, applications, or submissions that necessitate accuracy and completeness upon a first submission.
Overall, "once only" conveys a sense of finality or restriction, denoting a singular and non-repetitive occurrence or opportunity. It signifies that there will be no second chances or further opportunities associated with the particular event, action, or decision at hand.
The phrase "once only" does not have a specific etymology as it is a combination of two common words, "once" and "only". Here are the etymologies of each word:
1. "Once": The word "once" originated from the Old English word "ānes", which means "one time" or "one occurrence". It is derived from the Middle Low German word "ēnes", which has the same meaning. Over time, the spelling and pronunciation changed, leading to the modern word "once".
2. "Only": The word "only" originated from the Old English word "ānlic", which means "alone" or "sole". It is derived from the combination of "ān" (meaning "one") and "-lic" (a suffix indicating "like" or "similar to"). The word gradually shifted in spelling and pronunciation to become "only" in modern English.
