| Word | Definitions | Synonyms |
|---|---|---|
| fatally | (adverb) with fatal consequences or implications | - |
| fatefully | (adverb) in a prophetically fateful manner | - |
| fatuously | (adverb) vacuously or complacently and unconsciously foolish | Synonyms: inanely |
| indefatigably | (adverb) with indefatigable energy | Synonyms: inexhaustibly, tirelessly |