specialize
to become skilled in a particular subject
lieder
a type of German song
colored
to be of a skin colour other than white
stroke
a sudden disabling attack or loss of consciousness caused by an interruption in the flow of blood to the brain
leukemia
a form of cancer
justice
to be judged fairly
orphan
someone with no parents
prejudice
to be narrow-minded about people according to their race, religion etc.