Definitions

1. adverb

in a manner that shows no lack of energy or strength; vigorously

“She sang unfeebly in the choir, her voice filling the entire auditorium.”

2. adverb

in a manner that shows no lack of courage or determination; boldly

“He spoke unfeebly against the injustice, inspiring the crowd to rise up.”

3. adverb

in a manner that shows no lack of power or effectiveness; effectively

“She wrote unfeebly about the issue, bringing it to the attention of the authorities.”