A sister is the female sibling.
The term sister comes from Old Norse systir which itself derives from Proto-Germanic *swestēr, both of whom have the same meaning, i.e. sister. Some studies have found that sisters display more traits indicating jealousy around their siblings than their male counterparts, brothers. In some cultures, sisters are afforded a role of being under the protection by male siblings, especially older brothers from issues ranging from bullies or sexual advances by womanizers. In some quarters the term sister has gradually broadened its colloquial meaning to include individuals stipulating kinship. In response, in order to avoid equivocation, some publishers prefer the usage of female sibling over sister.
Various studies have shown that an older sister is likely to give a varied gender role to their younger siblings as well as being more likely to develop a close bond with their younger siblings. Older sisters are more likely to play with their younger siblings. Younger siblings display a more needy behavior when in close proximity to their older sister and are more likely to be tolerant of an older sisters bad behavior. Boys with only an older sister are more likely to display stereotypically male behavior, and such masculine boys increased their masculine behavior with the more sisters they have. The reverse is true for young boys with several sisters, as they tend to be feminine, however they outgrow this by the time they approach pubescence. Boys with older sisters were less likely to be delinquent or have emotional and behavioral disorders. A younger sister is less likely to be scolded by older siblings than a younger brother. The most common recreational activity between older brother/younger sister pairs was art drawing. Some studies also found a correlation between having an older sister and constructive discussions about safe sexual practises. Some studies have shown that men without sisters are more likely to be ineffectual at courtship.Awan and Azura, daughters of Adam and EveMary I of England and Elizabeth I of England, royaltyCaroline, Princess of Hanover and Princess Stéphanie of MonacoTamar Braxton, Toni Braxton, Towanda Braxton, Traci Braxton, and Trina Braxton, known as The BraxtonsJacqueline Bouvier Kennedy Onassis and Lee RadziwillMary and Eliza Chulkhurst, conjoined twins known as the Biddenden MaidsJackie Collins, author and Joan Collins, actressAnnie Elizabeth Delany and Sarah Louise Delany, the subjects of Having Our Say (1993)Hilary Duff, actress, and Haylie Duff, singerEva Gabor, Magda Gabor, and Zsa Zsa Gabor, actresses and singersMelissa Gilbert and Sara Gilbert, actressesIlona and Judit Gófitz, conjoined twinsMariel Hemingway and Margaux HemingwayParis Hilton and Nicky Hilton, socialitesMaureen "Rebbie" Jackson, La Toya Jackson, and Janet Jackson, members of the Jackson familyKhloe Kardashian, Kim Kardashian, Kourtney Mary Kardashian, reality TV starsRose Marie "Rosemary" Kennedy, Kathleen Agnes "Kick" Kennedy Cavendish, Eunice Mary Kennedy Shriver, Patricia Helen "Pat" Kennedy Lawford, and Jean Ann Kennedy Smith, members of the Kennedy familyBeyoncé and Solange KnowlesCaroline Manzo and Dina Manzo, reality TV stars who married brothers Albert and Tommy ManzoMillie and Christine McCoy, conjoined twinsGrand Duchess Olga Nikolaevna of Russia, Grand Duchess Tatiana Nikolaevna of Russia, Grand Duchess Maria Nikolaevna of Russia and Grand Duchess Anastasia Nikolaevna of Russia, also known by the acronym OTMA, daughters of the last autocratic ruler of the Russian EmpireAshley Olsen and Mary-Kate Olsen, also known as "The Olsen Twins", twin actresses and fashion designersAnita Pointer, Bonnie Pointer, Issa Pointer, June Pointer, Ruth Pointer, and Sadako Pointer, at various times members of the singing group known as The Pointer SistersKim Richards and Kyle Richards, actresses and reality TV starsRita and Cristina of Parodi of Sardinia, conjoined twinsJessica Simpson and Ashlee Simpson, singer-songwritersBritney Spears, singer, and Jamie Lynn Spears, actressJohanna, Martina, Maria, Hedwig, Agathe, Rosmarie, and Eleonore ("Lorli") Von Trapp, daughters of Georg von TrappPriscilla "CeCe" Winans, Angelique Winans-Caldwell, Debra Renee Winans-Lowe, members of Winans family of singers and musiciansWhat Ever Happened to Baby Jane? (1962 film)Hannah and Her Sisters (1986), filmHanging Up (2000), filmLaura Lee Hope's Bobbsey Twins novels, which included two sets of fraternal twins: 12-year-old Nan and Bert, and six-year-old Flossie and FreddieIn Her Shoes (2002), novelHope & Faith, American sitcomSisters (TV series)What I Like About You, TV series