B. to insert at intervals.
Intersperse is a verb, and it's dictionary meaning is: "<span>scatter among or between other things; place here and there."
ie, "the conversation was interspersed with silences".</span>
Answer:
Ist is defined as involved in a particularly field or having a certain interest or belief.
Explanation:
Basically what it says, if you mean -ist as in with jobs or occupations, it's the field of what a person is skilled with or occupied with.