marginal (
http://definr.com/marginal)
adj 1: at or constituting a border or edge; "the marginal strip of
beach" [syn:
edge(a),
fringe(a),
fringy]
2: of questionable or minimal quality; "borderline grades";
"marginal writing ability" [syn:
borderline]
3: of a bare living gained by great labor; "the sharecropper's
hardscrabble life"; "a marginal existence" [syn:
hardscrabble]
4: just barely adequate or within a lower limit; "a bare
majority"; "a marginal victory" [syn:
bare(a)]
5: producing at a rate that barely covers production costs;
"marginal industries"; "marginal land"