Study the word below and choose the part that is not an affix.

interdepartmental

al

de

inter

department

D: department

Explanation:

The word interdepartmental is an adjective that means between or involving different departaments of a company, goverment etc. This word is formed by the noun department and two affixes (group of letters added to the beginning or end of a word), which are: the prefix inter (between or among) and the suffix al (connected with).