Question

Select the appropriate synonym or antonym for the underlined word below:

The disease acted quickly, destroying the plant over the course of ten years.
litigiously
vacuously
maladroitly
insidiously

Answer 1

Insidiously

Step-by-step explanation:

All the other words don't make sense if you were to substitute them into the sentence.

Insidiously = something that occurs slowly

This means that the word "insidiously" would be the antonym of "quickly."