I was a way of letting go. Once she threw it in the ocean, she was able to pass away and be with her true love. i wont explain but i would just say (heart of the ocean->rose), (ocean->jack dawson), (brock lovett->caledon hockley). thats why rose didnt give that diamond to brock.
Definition of post-traumatic stress disorder for English Language Learners medical: a mental condition that can affect a person who has had a very shocking or difficult experience (such as fighting in a war) and that is usually characterized by depression, anxiety, etc.
Post-Traumatic Stress Disorder (PTSD). An anxiety disorder that develops in reaction to physical injury or severe mental or emotional distress, such as military combat, violent assault, natural disaster, or other life-threatening events. PubMed Health Glossary. (Source: NIH-National Cancer Institute).