Marginal
Definition 1 of 4

Barely Sufficient
Used when something is just enough to meet the requirements or needs.

His effort on the project was marginal at best.
Negative Connotation
'Marginal' often suggests a lack of significance or effort.

Her contribution to the group work was marginal.
Compare with
minimalminornegligibleperisignificantslightsmalltrivial
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