| Word | Definitions | Synonyms |
|---|---|---|
| fiendishly | (adverb) as a devil; in an evil manner | Synonyms: devilishly, diabolically |
| fiercely | (adverb) in a physically fierce manner | Synonyms: ferociously |
| (adverb) in an emotionally fierce manner | - | |
| fierily | (adverb) with passionate fervor | Synonyms: fervently, fervidly |