general [v]
- härten
character [v]
- abhärten
- hart werden

general [v]
- durcir
character [v]
- endurcir

general [v]
- indurire
character [v]
- indurire
- indurirsi
- farsi insensibile

general [v]
- endurecer
character [v]
- endurecer
- endurecerse

general [v]
- verharden
- hard worden
character [v]
- harden
- hard worden

general [v]
- härda
character [v]
- härda
- härdas

general [v]
- endurecer
character [v]
- endurecer
- endurecer-se

toughen [v]
- accustom
- acclimate
- brace
- acclimatise
- acclimatize
- confirm
- discipline
- fortify
solidify [v]
- indurate
- fossilise
- fossilize
- cake
- ossify
- fix
- concrete
- petrify

Present participle; Past participle
- hardening
- hardened
Present
- harden
- harden
- hardens
- harden
- harden
- harden
Past
- hardened
- hardened
- hardened
- hardened
- hardened
- hardened
Future
- will harden
- will harden
- will harden
- will harden
- will harden
- will harden
Present conditional
- would harden
- would harden
- would harden
- would harden
- would harden
- would harden
Present Perfect
- have hardened
- have hardened
- has hardened
- have hardened
- have hardened
- have hardened
Past Perfect
- had hardened
- had hardened
- had hardened
- had hardened
- had hardened
- had hardened
Future Perfect
- will have hardened
- will have hardened
- will have hardened
- will have hardened
- will have hardened
- will have hardened
Past conditional
- would have hardened
- would have hardened
- would have hardened
- would have hardened
- would have hardened
- would have hardened
Imperative
- -
- harden
- -
- -
- -
- -