Every answers starts with the same 2 letters (SI), and by adding a word to SI, you create a whole new word.
-1.SI + jewelery worn by rappers, for instance = Brother or sister
-2.SI + Happiness, or pleasure = A source of illumination on the side of something
-3.SI + The period from Ash Wednesday to Holy Saturday = Quiet
-4.SI + distance equal to approximately 1.6 kilometres = A figure of speech that compares one thing with another
-5.SI + Not old = Tendon
-6.SI + a municipality in Eastern Germany = Threatening or foreboding
7.SI + to indicate, or mark = Annotation made in the left or right margin
-8.SI + Called on a communications device = Drew off, or transferred from one container to another by means of a tube
-9.SI + Stimpy's friend = Alarm
-10.SI + substance used to make roads = Indian musical instrument