他对同事困难的冷漠让大家都很失望。

His ___insensitivity to his colleague's difficulties disappointed everyone.

他对寒冷的不敏感让他在冬天也穿得很单薄。

His ___insensitivity to cold makes him wear light clothes even in winter.

他的玩笑话显示出对性别平等问题的漠视。

His joke showed ___insensitivity to gender equality issues.