take (one's) life
To kill one or oneself. In the latter case, "own" often precedes "life." Do you feel any remorse for taking their lives all those years ago? I was so saddened to hear that Daniel's father took his own life yesterday.
take someone's life
to kill someone. (Can include onself.) It's the executioner's job to take people's lives.
take (one's) life
To commit suicide.
take (someone's) life
To commit murder.