Similar words: harden, hard-earned, gardener, overburdened, landscape gardener, garden, warden, ardent. Meaning: ['hɑrdn /'hɑː-] 
adj. 1. used of persons; emotionally hardened 2. made hard or flexible or resilient especially by heat treatment 3. protected against attack (especially by nuclear weapons) 4. made tough by habitual exposure 5. converted to solid form (as concrete).
adj. 1. used of persons; emotionally hardened 2. made hard or flexible or resilient especially by heat treatment 3. protected against attack (especially by nuclear weapons) 4. made tough by habitual exposure 5. converted to solid form (as concrete). 
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271. The friendless childhood of Nydia had hardened prematurely her character.
272. But I will make you as unyielding and hardened as they are.
273. Equipped with high rigidity iron, X, Y, Z axes are hardened.
274. LTS-1 replenishment of pumping concrete of densitied silica fume can markedly improve the pumpability of pumping concrete and obviously increase the quality and strength of hardened concrete.
275. Practice had hardened me, and I grew audacious to the last degree.
More similar words: harden, hard-earned, gardener, overburdened, landscape gardener, garden, warden, ardent, ardently, gardening, herb garden, maddened, reddened, garden rake, emboldened, victory garden, botanical garden, burden, larder, warder, unburden, boarder, guarded, bearded, disburden, retarded, overburden, burdensome, opened, unguarded.