Pronunciation: [flˈuːk] (IPA) 
The word "fluke" is spelled with the letters f-l-u-k-e. In IPA phonetic transcription, it is transcribed as /flʊk/. The first sound is a voiceless labiodental fricative, the "f" sound. The second sound is a short u vowel, which is pronounced with the tongue in the central part of the mouth. The final sound is a voiceless velar plosive, the "k" sound. "Fluke" can refer to the tail fin of a marine mammal or a stroke of luck.
The word "fluke" has multiple meanings depending on the context in which it is used. Primarily, "fluke" can refer to a stroke of luck or a fortunate occurrence that happens by chance rather than through deliberate planning or effort. In this sense, it is often used to describe an unexpected or improbable success or outcome. For example, winning the lottery or stumbling upon a valuable item can be considered a fluke.
Additionally, "fluke" can also be used to describe a parasitic flatworm, typically found in marine environments, which can attach itself to the internal organs of fishes and mammals, causing various infections. These organisms are usually thin, leaf-shaped, and have a sucker-like structure that allows them to attach to their host.
In a different context, "fluke" can refer to the fins or lobes found on the tail of a whale, dolphin, or other aquatic mammals. These flukes are horizontally oriented and are used for propulsion and steering in water.
Furthermore, "fluke" can be used to describe a coincidence or an accidental mistake. It can occur when a person accidentally achieves success, often due to a lack of skill or intention. In this sense, it is often used to convey a sense of unplanned or unintentional achievement or success. For example, hitting a golf ball in a poorly executed shot that ends up landing very close to the hole can be a fluke.
• That part of an anchor which catches the ground.
• The broad part of the anchor which fastens in the ground.
• A fish called a flounder.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "fluke" has a fascinating etymology. It originated from Middle English and Old English with the word "flūc". The Old English term "flūc" was used to denote the flatfish species, particularly the flounder.
The word can be traced back even further to Proto-Germanic, where it had variations such as "flōkō" and "flukō". The Proto-Germanic word likely evolved from Proto-Indo-European, with its root being "pluh₂-", meaning "to flow" or "to float".
Over time, the meaning of "fluke" extended beyond just the specific type of flatfish and started to be used metaphorically. It came to represent something unexpected or accidental, similar to the idea of a fish being caught (or the fluke of a fish hook) by chance rather than by deliberate effort.
