marginal
US /ˈmɑːr.dʒɪ.nəl/
UK /ˈmɑːr.dʒɪ.nəl/

1.
relating to or situated at the edge or margin of something
:
•
There was a marginal note in the book.
•
The village is located in a marginal area near the forest.
2.
of secondary importance; not central or fundamental
:
•
His contribution was marginal to the success of the project.
•
The issue was considered of marginal importance.
3.
not quite reaching a specified level or standard
:
•
His performance was marginal, just enough to pass.
•
The company made only a marginal profit last quarter.