कठोर

Etymology
.

Adjective

 * 1) hard
 * 2) harsh
 * 3) rigid
 * 4) strict
 * 5) severe
 * 6) tough
 * 7) stringent
 * 8) stiff
 * 9) callous
 * 10) rough
 * 11) leathery

Etymology
From the root.

Adjective

 * 1) strict, cruel, severe, hard-hearted
 * 2) sharp, solid, stiff, offering resistance.