The words are based on the Latin words for brother and sister.

VOA: special.2009.09.25

He finds it better to say that a brother and sister had sex together than to admit that she had sex with one of the common town boys of Jefferson.

VOA: special.2010.01.10

In eighteen eighty-six, Maggie Tobin left home for the town of Leadville,Colorado, to join a sister and brother who already lived there.

VOA: special.2010.03.08

"And,it is strange that if you hate my brother so much, why would you marry his sister!"

VOA: special.2009.06.27

Her sister and brother were already in school when she was born.

VOA: special.2010.03.14

He had a younger brother, Abbott Lawrence, and a younger sister,Amy.

VOA: special.2010.07.11