How to Say "My Sister" in French

ma sœur

In French, "my sister" is ma sœur.

The phrase is used to identify a female sibling of the speaker.

What does it mean word for word?

ma is the feminine singular possessive adjective for "my", and sœur means "sister".

Ma p'tite sœur is an informal, endearing way to refer to a younger sister.

Ma frangine is an informal term used primarily in France.

To say 'my sisters' (plural), the possessive adjective changes from ma to mes and sœur takes an 's' to form mes sœurs.

The term sœur de lait refers to a 'milk sister', meaning a girl who was breastfed by the same woman but is not a biological sibling.
If you are speaking to a nun, you might address her as ma sœur, even though there is no biological relation.
While ma is the possessive for 'my', if sœur is replaced by a word starting with a vowel, you must use mon even for a female sibling.

J'y vis ma sœur.
I saw my sister there.
Tatoeba #1719038 by sacredceltic, translation #322293 by CK
Où est ma sœur ?
Where's my sister?
Tatoeba #5822113 by Yemana, translation #2254652 by CK
Ma sœur est jolie.
My sister is pretty.
Tatoeba #822095 by Julien_PDC, translation #251899 by CK
Ma sœur est médecin.
My sister is a doctor.
Ma p'tite sœur est une artiste talentueuse.
My little sister is a talented artist.
Ma sœurette adore la musique.
My little sister loves music.
J'admire ma grande sœur qui a accompli tant de choses.
I admire my older sister who has achieved so much.
385 more sentences on Tatoeba

Nathan is showing a photo to Chloé.

Nathan

Regarde, c'est ma sœur sur cette photo.
Look, this is my sister in this photo.
Chloé

Elle est très sympa, ta sœur !
Your sister is very nice!
Nathan

Oui, ma sœur habite maintenant à Paris.
Yes, my sister lives in Paris now.
Chloé

C'est super pour elle.
That's great for her.

Sources

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