A new word could be formed by taking away the suffix of an exist

A new word could be formed by taking away the suffix of an existing word, such a process is called ______.
A、clipping
B、back-formation
C、abbreviation
D、acronym
【正确答案】：B
【题目解析】：Back-formation is a process by which new words are formed by taking away the suffix of an existing word.