hardening
🇺🇸
/ˈhɑːrdnɪŋ/
🇬🇧
/ˈhɑːdnɪŋ/
The process of making something firm or solid.
The hardening of the metal was done by heating it.
金属の硬直化は、それを加熱することで行われました。
The process of becoming less friendly or more determined.
The boss's hardening attitude made the employees nervous.
上司のますます厳しくなる態度が社員たちを神経質にさせた。