One is pronounced as [wʌn] in English. It is a number that represents the quantity of an item. When used before words like hundred or thousand, or with units of measurement, it is used to indicate a single item. It can also be used to emphasize that there is only one of something. For example, "Formula One" refers to the highest class of single-seater auto racing.
In pronoun form, "one" is used to avoid repetition or to refer to a person or thing that has already been mentioned. It is a formal way of saying "I" or "you" in certain contexts. For instance, "Marine One" is the helicopter used by the President of the United States.
The phrase "one pair" is commonly used in card games like poker to indicate a pair of cards with the same value.
Here is an example sentence: "They had three sons and one daughter."
The word "only" is related to "one" and means something that is exclusive or singular. It can be an adverb, adjective, or conjunction. For example, "Only the president could authorize the use of the atomic bomb."
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