radically

In a way that changes something completely or makes it very different.

• Their views are radically different.
• The city has changed radically since my childhood.
• We need to radically rethink our approach.

Similar words: fundamentally, drastically

Common phrases: radically different, change radically, radically alter something

At the root or origin of something, especially a word.

• These words are radically related.
• The scholar considered the two forms radically identical.
• The spellings differ, but the words are radically the same.

Common phrases: radically related, radically identical, radically the same