1 relating to the basic nature of something: radical faults in the design.
az: əsaslı, köklü
ru: коренной
2 thorough; complete: radical changes.
az: əsaslı, tam
ru: полный
3 wanting or involving great or extreme political, social or economic changes: radical politics.
az: radikal
ru: радикальный
♦ noun
a person who wants radical political changes: a left-wing radical.
az: radikal fikirli şəxs
ru: радикал