Severe in Malayalam

Malayalam words whose English meaning includes “severe”:

അതീഷ്ണ (atheeshna) — Not hard or severe.
അത്യുഷ്ണം (athyushnam) — High temperature, severe heat.
കടുത്ത (kadutha) — Severe, cruel, extreme, intense.
കടുപ്പിക്കുക (kaduppikkuka) — Harden, make severe.
തീവ്രശ്രമം (theevrashramam) — Severe or intense effort, endeavour.
രൂക്ഷ (rooksha) — Severe, harsh, pungent, hard.