How to Say "fluke" in Spanish
The most common Spanish word for “fluke” is “casualidad” — use 'casualidad' when 'fluke' refers to a surprising coincidence or a stroke of good luck, often unexpected..
casualidad
/kah-soo-ah-lee-DADH//kaswaliˈðað/

Examples
¡Qué casualidad encontrarte aquí!
What a fluke running into you here!
¡Qué casualidad! Estaba pensando en ti.
What a coincidence! I was just thinking about you.
Encontré las llaves perdidas por pura casualidad.
I found the lost keys purely by chance.
Si ves a mi hermano, ¿podrías decirle que me llame? Solo si es casualidad.
If you see my brother, could you tell him to call me? Only if it’s by chance.
The 'By Chance' Expression
To say that something happened 'by chance' or 'accidentally,' always use the fixed expression 'por casualidad.' This is a key phrase to memorize.
Casualidad vs. Accidente
Mistake: “Using 'casualidad' to mean a car crash or a physical injury.”
Correction: Use 'accidente' for crashes or physical mishaps. 'Casualidad' refers only to an unpredicted event or coincidence: 'Tuvimos un accidente de coche' (We had a car accident).
accidente
/ak-see-DEN-tay//ak.siˈðen.te/

Examples
Nuestro encuentro fue un simple accidente del destino.
Our meeting was a mere fluke of fate.
Nuestro encuentro no fue planeado, fue un simple accidente del destino.
Our meeting wasn't planned, it was a simple accident of fate.
En la filosofía, se distingue entre la esencia y el accidente.
In philosophy, a distinction is made between essence and accident (a non-essential property).
barba
BAR-bah/ˈbaɾβa/

Examples
La barba del anzuelo es crucial para pescar.
The fluke of the fishhook is crucial for fishing.
La barba del anzuelo evita que el pez se escape fácilmente.
The barb of the hook prevents the fish from easily escaping.
Asegúrate de que la barba de la flecha esté afilada antes de cazar.
Make sure the barb of the arrow is sharp before hunting.
Specialized Context
This definition is usually only heard when talking about fishing gear, arrows, or specialized tools. If you are talking about people, 'barba' almost always means 'beard'.
Luck vs. Event vs. Anchor Part
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