Pronunciation: [swˈɛl ˈa͡ʊt] (IPA) 
The word "swell out" is spelled as /swɛl aʊt/. It is a phrasal verb that means to bulge or expand outward. The spelling of "swell" is straightforward, with the /swɛl/ sound made by the combination of an "s" and "w". The "out" portion of the word is also straightforward, with the /aʊt/ sound made by the combination of an "a" and "u". When combined, the two parts of the word create the phonetic transcription of /swɛl aʊt/.
The term "swell out" refers to the act of expanding or bulging outward, typically in reference to a particular object or part of the body. It implies a noticeable increase in size or volume, resulting in a more prominent or enlarged appearance.
When an object or material "swells out," it indicates that it is undergoing a physical change where its dimensions are extending beyond its normal state. This can occur due to the accumulation or insertion of additional elements, such as air, water, or gas, causing an expansion that alters the shape or structure of the subject. For instance, when a balloon is blown up, it swells out as the air fills its interior, causing it to enlarge and become more rounded.
Similarly, the expression can also relate to the human body. For example, when a person sustains injury or experiences an allergic reaction, the affected area may swell out as a result of inflammation or the accumulation of fluid. This can be observed in conditions such as a swollen ankle or swollen lymph nodes.
Overall, "swell out" captures the notion of something growing or bulging outward, either temporarily or permanently, due to factors such as inflation, expansion, inflammation, or the presence of additional substances.
The word "swell out" is a compound word consisting of the verb "swell" and the preposition "out".
The noun "swell" has Old English roots, stemming from the Proto-Germanic word "swellanan", meaning to grow or become larger in size or volume. It eventually evolved into "swellan" in Old English, originating from the West Germanic language. The word remained relatively unchanged and was inherited by Middle English as "swellen".
The preposition "out" has Old English origins as well, derived from the Proto-Germanic word "ūt". It indicates movement or expansion beyond a particular point or boundary.
Combining the verb "swell" and the preposition "out", "swell out" conveys the action of something enlarging, expanding, or protruding beyond its normal size or shape.
