insensible
insensitive
Origin: From Latin insensibilis, 'incapable of feeling'.
Also means
numb
Usage Note
Insensible covers both physical numbness (el frío le dejó los dedos insensibles) and emotional insensitivity (es insensible al dolor ajeno). Be aware of the false-friend risk: English 'insensible' can mean 'unconscious', but Spanish insensible does not normally carry that meaning — use inconsciente or sin conocimiento for that. The antonym is sensible, which itself is a partial false friend (meaning 'sensitive', not 'sensible').
Examples
"Parecía insensible ante el sufrimiento ajeno."
Natural Translation
She seemed insensitive to others' suffering.

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