1. dis- "apart" + posit- + -ion.
2. 含义:put things apart, put things to their different positions (directions), put in order, arrange, distribute.
3. 也就是把各种事情、东西放置到他们各自不同的位置上。
4. References to "temperament" are from astrological use of the word for "position of a planet as a determining influence".
5. pre- + dispose.