# interferir
## Catalan
### Etymology

Learned borrowing from Latin interferre, with normal change of conjugation to -ir.

### Verb

interferir (first-person singular present interfereixo, first-person singular preterite interferí, past participle interferit)
* (physics, of a wave, intransitive) to interfere (to overlap another wave)
* (intransitive, reflexive) to interfere (to get involved or involve oneself, causing disturbance)

#### Related terms

* interferència

### Further reading

* “interferir” in Diccionari de la llengua catalana, segona edició, Institut d’Estudis Catalans.
* “interferir”, in Gran Diccionari de la Llengua Catalana, Grup Enciclopèdia Catalana, 2025
* “interferir” in Diccionari normatiu valencià, Acadèmia Valenciana de la Llengua.
* “interferir” in Diccionari català-valencià-balear, Antoni Maria Alcover and Francesc de Borja Moll, 1962.

## Galician
### Etymology

From Latin inter- + ferire.

### Verb

interferir (first-person singular present interfiro, third-person singular present interfire, first-person singular preterite interferín, past participle interferido) interferir (first-person singular present interfiro, third-person singular present interfere, first-person singular preterite interferim or interferi, past participle interferido, reintegrationist norm)
* to interfere (to get involved or involve oneself, causing disturbance)
    Synonym: entremeterse
    Non quero interferir na túa vida.I don't want to interfere with your personal life.
* (physics, of a wave) to interfere (to overlap another wave)

#### Conjugation

$^1$Less recommended.

#### Related terms

* interferencia
* interferente
* interferometría
* interferómetro

### Further reading

* “interferir”, in Dicionario da Real Academia Galega (in Galician), A Coruña: Royal Galician Academy, 2012–2025
* “interferir” in Dicionário Estraviz de galego (2014).

## Portuguese
### Etymology

From Latin inter- + ferīre (“to strike”).

### Pronunciation

* (Brazil) IPA: /ĩ.teʁ.feˈɾi(ʁ)/ [ĩ.teh.feˈɾi(h)]
* (Brazil) IPA: /ĩ.teʁ.feˈɾi(ʁ)/ [ĩ.teh.feˈɾi(h)]
** (São Paulo) IPA: /ĩ.teɾ.feˈɾi(ɾ)/
** (Rio de Janeiro) IPA: /ĩ.teʁ.feˈɾi(ʁ)/ [ĩ.teχ.feˈɾi(χ)]
** (Southern Brazil) IPA: /ĩ.teɻ.feˈɾi(ɻ)/
* (Portugal) IPA: /ĩ.tɨɾ.fɨˈɾiɾ/
* (Portugal) IPA: /ĩ.tɨɾ.fɨˈɾiɾ/
** (Southern Portugal) IPA: /ĩ.tɨɾ.fɨˈɾi.ɾi/
* Hyphenation: in‧ter‧fe‧rir

### Verb

interferir (first-person singular present interfiro, third-person singular present interfere, first-person singular preterite interferi, past participle interferido)
* to interfere (to get involved or involve oneself, causing disturbance)
    Não quero interferir na tua vida pessoal.I don't want to interfere with your personal life.
* (physics, of a wave) to interfere (to overlap another wave)

#### Related terms

* interferência
* interferencial
* interferente
* interferometria
* interferométrico
* interferómetro

### References

* “interferir”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2025
* “interferir”, in Dicionário infopédia da Língua Portuguesa (in Portuguese), Porto: Porto Editora, 2003–2025

## Spanish
### Pronunciation

* IPA: /inteɾfeˈɾiɾ/ [ĩn̪.t̪eɾ.feˈɾiɾ]
* Rhymes: -iɾ
* Syllabification: in‧ter‧fe‧rir

### Verb

interferir (first-person singular present interfiero, first-person singular preterite interferí, past participle interferido)
* to interfere

#### Conjugation

$^1$Mostly obsolete, now mainly used in legal language. $^2$Argentine and Uruguayan voseo prefers the tú form for the present subjunctive.
These forms are generated automatically and may not actually be used. Pronoun usage varies by region.

#### Related terms

* interferencia

### Further reading

* “interferir”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8, Royal Spanish Academy [Spanish: Real Academia Española], 2024 December 10