transcription, транскрипция: [ ˈhär-d ə n ]
verb
( hard·ened ; hard·en·ing ˈhärd-niŋ, ˈhär-d ə n-iŋ)
Date: 13th century
transitive verb
1. : to make hard or harder
2. : to confirm in disposition, feelings, or action ; especially : to make callous
harden ed his heart
3.
a. : inure , toughen
harden troops
b. : to inure to unfavorable environmental conditions (as cold) — often used with off
harden off seedlings before transplanting
4. : to protect from blast, heat, or radiation (as by a thick barrier or placement underground)
intransitive verb
1. : to become hard or harder
2.
a. : to become firm, stable, or settled
b. : to assume an appearance of harshness or severity
her face harden ed at the thought
3. : to become gradually acclimatized to unfavorable conditions — often used with off
plants harden ed off before the first frost