What is another word for becomes toughened?
Pronunciation: [bɪkˌʌmz tˈʌfənd] (IPA) 
The phrase "becomes toughened" can be replaced with a variety of synonyms, depending on the context and intended meaning. Some possible options might include "strengthens," "hardens," "fortifies," "stiffens," "solidifies," "reinforces," "intensifies," or "toughens up." These alternatives each convey a sense of increased durability, resilience, or resistance, and may be used to describe physical, emotional, or intellectual processes. For example, a piece of metal might be described as "hardening" under heat and pressure, while a person might need to "toughen up" in order to face challenges or overcome difficulties.
