Which of these words best conveys a connotation of power?
a. mentor
b. dictator
c. leader
d. teacher

It depends on the connotation of the word.
a. mentor- helps you shape your future
b. dictator- negative connotation, too controlling
c. leader- guidance
d.teacher- fills your knowledge

I WOULD SAY C. LEADER

Syllable added to a root word to change its meaning : affixan independent word--example run,walk,book : free morphemeaffix that gives grammatical meaning such as tense or number : inflectiona word part that must attach to a word in order to be usable : bound morphemedegree of comparison formed by adding -er or more to an adjective : comparativedegree of comparison formed by adding -est or most to an adjective : superlativeaffix added to the beginning of a word : prefixaffix added to the end of a word : suffixroot word of lovable : lovetwo roots used together to form one word : combining form