The answer for this question would be Two words
Ethymology is a study about word origin and their meaning. In this case, osteoarthritis is from word osteo- which means bone and arthritis that means inflammation in the joint. Those words are from the Greek language.
Can not let anyone do anything. Because he/she is scared that they will get hurt... or they could hurt some one if they hurt his/her friend.
A bad trend would be Christmas sweater with orange skirt
B. cholesterol is a steroid
When he has heard the whisle and doesnt stop