Marginal
Part of speech: noun
Definition: Something that is marginal. Especially a constituency with a small winning margin.
Part of speech: adjective
Definition: of, relating to, or located at a margin or an edge geographically adjacent written in the margin of a book at the lower extent of a standard of land that is barely productive of an electoral district (such as a parliamentary constituency) where the winning margin was a small proportion of the total number of votes, so that only a small change in voting behaviour is necessary to alter the outcome of an election.
Example sentence: Chess masters don't evaluate all the possible moves. They know how to discard 98 percent of the ones they could make and then focus on the best choice of the remaining lot. That's the way expertise works in other fields, too: Wise practitioners recognize familiar patterns and put their creativity, improvisation, and skill toward the marginal cases.
Meagerly
Part of speech: adverb
Definition: In a meager way; poorly; inadequately.