While there are words that we should not teach children and not use in a polite public environment, known as bad language. There is one word that gets passed around all the time and is probably the most hurtful and scary word out there. That would is metastasis. If you do not know what this means, here is the definition.
the transference of disease-producing organisms or of malignant or cancerous cells to other parts of the body by way of the blood or lymphatic vessels or membranous surfaces.
About five years ago my mother in law got breast cancer, she had a mastectomy and then she was told she was fine. This last September she was diagnosed with breast cancer again, and had a mastectomy on the other breast. Then when they were doing her post check ups they saw something on her lungs and we got to fully learn as a family the full meaning of the world metastasis. She is doing the kemotherapy now, but has been told that the spots on her lungs are more then one and very numerous. Lets put it this way, the doctor mentioned that the treatment will give her more time, but will not save her.
This is not my first contact with this word in my life, but every time I have encountered it, I attended a funeral a short time later. So if you ask me, there is no worse world then the word metastasis and I hope none of you or any one you care about, ever has to hear it mentioned about you or them.