Suicide implies that you are committing a crime by taking your own life. And I know that many years ago, this word has became illicit.
Not necessarily illegal, but it's not lawfully correct anymore.
You can't be charged with a crime once you're already dead, because you can't do time in jail. It's pointless.
Suicide makes ideation of death seem like an awful thing, when in fact, it's not as bad as society says it is.
So yes, this is indeed a trigger word for me. I tend to go into shut down mode whenever said around me. I will physically stop smiling, and really stop talking all together. I basically become monotone and shut out all emotion.