Pronunciation: [kˈʌpfə͡l] (IPA) 
The word "cupful" is spelled with a "u" after the "p" because it follows the rule that when a consonant is followed by a "u," it creates a "long u" sound. The phonetic transcription for "cupful" is /ˈkʌp.fʊl/, with the stress on the first syllable. The "k" sound at the beginning of the word is followed by a short "u" sound represented by "u" and another short "u" sound represented by "up." Finally, the word ends with a "fʊl" sound.
Cupful is a noun that refers to the quantity or measurement of a substance that fills, occupies, or is contained within a cup. It describes the amount of a substance that a cup can hold.
Typically, a cupful is derived from the standard measurement of a cup, which is a unit used to quantify liquids, powders, or loose solids. It is commonly used in cooking, baking, or following a recipe to accurately measure and add ingredients.
The term "cupful" is often interchangeable with "cup," but it emphasizes the specific amount or quantity. It indicates the capacity of a cup as a unit of measurement rather than an empty vessel. A cupful may vary in size depending on the context, as cups can have different measurements in different regions of the world. It can be equivalent to 8 fluid ounces (237 milliliters) in the United States, 250 milliliters in the United Kingdom, or 200 milliliters in Australia.
In colloquial usage, "cupful" can also be applied to non-measurable items that fit or overflow within a cup. This can include objects like coins, candies, or small trinkets when referring to a cup as a container for collecting or storing such items.
Overall, "cupful" is a term used to specify the quantity of a substance that can be contained within a cup, serving as a practical and standardized unit of measure for various purposes.
The word "cupful" is derived from the combination of two words: "cup" and the suffix "-ful" used to indicate a quantity or amount.
The word "cup" has its roots in the Old English word "cuppe", which originated from the late Latin word "cuppa" meaning "a small vessel for holding liquid". This Latin term could have possibly derived from the Greek word "kypellon" or "kypellum", which also means "drinking cup". Thus, the word "cup" has a long history across different languages.
The suffix "-ful" comes from the Old English word "-ful", which is related to the German "-voll" and Dutch "-vol", meaning "full". It is used to form nouns or adjectives indicating a quantity or amount that fills or completes something.
