“really”

In a way that is authentic and without pretense.

“She was genuinely terrified when the lights went out across the entire city.”

Best for: Works well in earnest, conversational, or journalistic writing when sincerity matters.

To a deep or intense degree, touching the core of something.

“The speech profoundly moved everyone in the auditorium to silence.”

Best for: Best reserved for emotional, philosophical, or weighty subjects to avoid overuse.

To an unusually great extent, surpassing normal limits.

“The old manor was exceedingly cold, even in the middle of July.”

Best for: Fits formal prose, period fiction, or anywhere a touch of old-world gravity is welcome.

With intense, forceful, almost aggressive energy or conviction.

“He was fiercely proud of the small bakery his grandmother had built from nothing.”

Best for: Punchy and visceral; ideal for narrative writing, character description, or strong opinions.

To a degree that departs notably from what is usual or expected.

“She possessed an uncommonly sharp memory for faces she had seen only once.”

Best for: Elegant understatement; suits refined prose where subtlety outperforms emphasis.

In a manner that is true in the fullest, most emphatic sense of the word.

“The jungle canopy was veritably alive, humming with ten thousand unseen creatures.”

Best for: Archaic and theatrical; use sparingly for dramatic or ironic literary effect.