fi
“fi” means “phi” in Spanish. It has 2 different meanings depending on context:
phi
Also: the letter phi
📝 In Action
La letra fi se utiliza mucho en las fórmulas de física.
B2The letter phi is used a lot in physics formulas.
No sé cómo dibujar la fi minúscula.
B1I don't know how to draw the lowercase phi.
Fi es la vigesimoprimera letra del alfabeto griego.
B2Phi is the twenty-first letter of the Greek alphabet.
phi
Also: the golden ratio
📝 In Action
El número fi representa la proporción áurea en el arte.
C1The number phi represents the golden ratio in art.
Muchos arquitectos usan el valor de fi para sus diseños.
C1Many architects use the value of phi for their designs.
Fi es un número irracional muy famoso.
B2Phi is a very famous irrational number.
Translate to Spanish
Words that translate to "fi" in Spanish:
phi→✏️ Quick Practice
Quick Quiz: fi
Question 1 of 3
When referring to 'fi' as a letter of the alphabet, which article should you use?
📚 More Resources
👥 Word Family▼
📚 Etymology▼
From the Greek word for the letter 'phi' (φῖ). It entered Spanish as part of the specialized vocabulary for math and science.
First recorded: Ancient texts, but standardized in modern spelling in the 18th century.
Cognates (Related words)
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Frequently Asked Questions
Is 'fi' the same as 'fí' with an accent?
No. In modern Spanish, 'fi' does not have an accent. 'Fió' (with an accent on the o) is a form of the verb 'fiar' (to trust), but 'fi' on its own is just the letter.
Is 'fi' used in music like 'do-re-mi'?
No, the musical notes are 'do, re, mi, fa, sol, la, si'. 'Fi' is not one of them.
Can I use 'fi' as a shorter way to say 'final'?
No, that's not common in Spanish. You should always use the full word 'final' or 'fin'.