Adjective
1. insignificant
2. unimportant
4. neither here nor there
5. incidental
6. inessential
7. nonessential
8. immaterial
9. irrelevant
10. negligible
11. inappreciable
12. inconsiderable
13. slight
14. minor
16. trifling
17. petty
18. paltry
19. measly
20. piddling
21. piffling
22. de minimis