petite soeur
The word 'soeur' is French for sister. The word may be used to refer to one's biological sister. Or it may be used to mean a religious sister, such as in a convent.
The French word for "your sister" is "ta sœur".
The phonetic pronunciation of the French word for sister, "soeur," is /sœʁ/.
The French words for brother and sister are frere (brother) and seour (sister). There is a popular children's song which has "frere" in the title. It is called "Frere Jacques". This song is known in English as "Brother John".
The French word for sister is sœur, pronounced "suhr". It is, logically, a feminine noun.The o and the e should be joined into one character, but it's not that big a deal.
A sister-in-law is "une belle-sœur" in French. The same word is also used for a step-sister.
petite soeur
If you wanted to speak of brotherly/sisterly sentiments in French, the adjective "fraternel / fraternelle" would be used. They come from the Latin word fratria used to speak of siblings (boys and girls alike).Technically, a French adjective related to the word "soeur" (sister) is the word "sororel" which shares the same roots as "sister" or "sorority". Absolutely nobody will understand it.
Soeur
belle-soeur
French for sister
'Little sister.'