masochist
The person may be indifferent, weary, depressed, detached, or withdrawn.
The term is masochism, and the person is a masochist.
the way the man felt about the pain and suffering of others was indifferent from all of his relatives
selfish, indifferent, inconsiderate
The one-word substitute for the ability to endure pain is "fortitude." This term encapsulates the strength of mind and spirit that allows an individual to withstand hardship and suffering.
what word can I substitute for constitutes
The word is optimist.(A person who is negative is a pessimist.)
An invalid
She was indifferent to his pleas. The machine was indifferent to any of the activities going on around it.
A good sentence with the word indifferent would go like this: You're quite indifferent from the others
The word is busybody.
The word could be "nitpicker."