Become aware of and Case-hardened

Case-hardened and become aware of are semantically related. In some cases you can use "Case-hardened" instead a verb "Become aware of".

Case-hardened adjective - Having or showing a lack of sympathy or tender feelings.

Become aware of and case-hardened are semantically related. Sometimes you can use "Become aware of" instead a verb phrase "Case-hardened".