To emotional conflicts and to external stressors. Some defense mechanisms (projection, splitting, acting out) are almost invariably maladaptive. Others (suppression, denial) may be either maladaptive or adaptive, depending on their severity, their inflexibility, and the context in which they occur.
The an illness that was hard to cure called the plague
Tend to stay motivated (also nice venti pfp)
Go on Google to search the words, that's what i do whenever i have a word search.