Concept:The word "Quell" means to suppress, calm, or pacify. Its antonym will have the opposite meaning, i.e., to stir up or disturb.
Explanation:First, understand "Quell": it means to bring something to an end, often by force, or to make it quiet.
Now examine the options:
- "Suppress" means to put down or stop, which is similar to quell, not opposite.
- "Calm" means peaceful and quiet, again similar.
- "Silence" means absence of sound, also similar.
- "Agitate" means to disturb, excite, or provoke unrest.
Clearly, "agitate" is the direct opposite of "quell". For example, quelling a protest means calming it, while agitating a crowd means stirring it up.
Thus, the antonym is "Agitate".
Answer:Option D (Agitate)