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Término vs. separação vs. rompimento vs. rutura

When discussion the end of a relationship, the choice of word often depends on the region and the seriousness of the commitment. While verbs like acabar or terminar are universal, the nouns vary. Término is favored in Brazil for dating, separação applies to marriages in both variants, while rutura shows a distinct spelling difference specific to Portugal.

Término

B1
This word literally means conclusion or ending. In Brazil, it is the most common and versatile noun for a breakup, used for everything from casual dating to serious relationships. In Portugal, it is understood but sounds more formal or clinical compared to using verbal phrases.
Ela ainda está sofrendo com o término do namoro.
(She is still suffering from the breakup of her relationship.)
Superar um término leva tempo.
(Getting over a breakup takes time.)
O anúncio do término surpreendeu os fãs.
(The announcement of the breakup surprised the fans.)

Separação

A2
This term means separation and suggests a disentangling of lives. It is used in both Brazil and Portugal, mostly when referring to marriages, civil partnerships, or long-term cohabitation involving shared assets or children.
A separação foi amigável por causa das crianças.
(The separation was amicable for the sake of the children.)
Eles estão a tratar da papelada da separação.
(They are dealing with the separation paperwork.)
Após dez anos de casados, decidiram pela separação.
(After ten years of marriage, they decided on a separation.)

Rompimento

B2
This word implies a breaking, severing, or snapping of a bond. As rompimento, it is widely used in Brazil to sound slightly more dramatic or definitive than término. It is often used for broken engagements or the severance of ties.
Houve um rompimento definitivo entre o casal.
(There was a definitive break between the couple.)
O rompimento do noivado causou um escândalo.
(The breaking off of the engagement caused a scandal.)
Eles optaram pelo rompimento total das relações.
(They opted for a total severing of relations.)

Rutura

B2
This is the European Portuguese spelling of rupture (where the p is silent and omitted in writing). In Brazil, this is spelled ruptura. In Portugal, rutura is often used to describe a sharp relationship breakdown or a psychological break.
A constante discussão levou à rutura da relação.
(The constant arguing led to the rupture of the relationship.)
Foi uma rutura dolorosa mas necessária.
(It was a painful but necessary breakup.)
O casal está em evidente estado de rutura.
(The couple is in an evident state of breakdown.)

Summary

Use término generically in Brazil for dating breakups. Use separação in both countries for ending marriages or serious cohabitation. Use rompimento when emphasizing the severing of a bond. Use rutura specifically in Portugal (spelled ruptura in Brazil) to describe the breakdown or collapse of the relationship.