Read the dictionary entry.

vigorous

\ˈvi-g(ə-)rəs

adj. 1. done with force and energy
2. related to strong growth

adv. vigorously

Read the sentence.

This pan will need a vigorous scrub if you expect to scrape out the burned eggs.

Which part of speech is the word vigorous in the sentence?


adverb

noun

verb

adjective