harden
verb (used with object)
to make hard or harder.
has been hardening
-
present perfect progressiveof harden (3rd person singular).present perfect progressive
Used to describe an action that began in the past, has continued continuously, and is still in progress.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Satellite imagery suggests that Iran has been hardening entrances to its nuclear sites in case of attack.
From The Wall Street Journal ● Feb. 27, 2026
Historically the focus of security has been hardening an organizations’ “DMZ,” the part of an organization’s network that connects to the Internet.
From Forbes ● Jul. 5, 2011
For roughly half a century, the musical repertory has been hardening into a core group of venerated masterpieces.
From Time Magazine Archive
The whole year round the thorn has been hardening and sharpening.
From Parables of the Cross by I. Lilias Trotter
