Etymology of the English word hardened
the English word hardened
derived from the English word harden
derived from the English word hard
derived from the English word heard
derived from the English word hear
derived from the Proto-Germanic root *khauzjianan
derived from the Proto-Indo-European root *kous-
derived from the Proto-Indo-European root *kar-
derived from the Proto-Germanic root *kharthus
using the English suffix -en
using the English suffix -ed