Pronunciation change

Adjective change

Positive
vigorous

Comparative
more vigorous

Superlative
most vigorous

  1. Vigorous: Energetic, using more energy; faster, harder.
    He made a vigorous search for the lost papers.

Adverb change

Positive
vigorous

Comparative
none

Superlative
none

  1. Vigorously: Same meaning, applied to the verb.
    He dried himself vigorously
    He polished his shoes vigorously