be as hard as nails

to have no feelings or sympathy for other people She'll be good in business - she's as hard as nails.

Name	Pronounced	Usage
Lekan	-	Western African, Yoruba
Pascual	pahs-KWAHL	Spanish
Darion	DER-ee-ən, DAR-ee-ən	English (Modern)
Momoka	mo-mo-kah	Japanese
Aldegonda	ahl-də-KHAWN-dah	Dutch
Cassia	KA-shə (English)	Ancient Roman