Once upon a time, not so long ago, “radical” was a lovely word

Up until I left Australia at the age of 21, “radical” was in my mind an objective term designating some kind of root, widely employed in pure mathematics, chemistry, music, grammar, political science and the philosophy of empiricism.

Bertrand Russell

• [mathematics] Of the root of a number or quantity.

• [chemistry] Group of atoms behaving as a unit in compounds.

• [music] Belonging to the root of a chord.

• [grammar] Root or base form of a word.

• [politics] Advocate of thorough or total political or social reform; a member of a political party or part of a party pursuing such aims.

• [empiricism] Theory that ultimate reality consists of pure experience.

These days, I'm sickened whenever I hear philistines linking this lovely word to barbarian hatred and crime.