以下字前應加甚麼正確的prefix使成有意思的字?

1)adopt--unadopted

2)belonging--unbelonging

3)function--nonfunctional

4)cohesive--incohesive

5)eligible--ineligible

6)reversible--irreversible

7)report--unreported

8)harmonic--inharmonic

9)appreciate--unappreciated

10)rule--unruled

11)connect--disconnect

12)favour--disfavour

13)employ--disemploy

14)continue--discontinue

15)debate--nondebate

16)hygienic--unhygienic