marginal adj.
[common] 1. [techspeak] An extremely small change. "A marginal
increase in core can decrease GC time drastically." In everyday terms, this
means that it is a lot easier to clean off your desk if you have
a spare place to put some of the junk while you sort through it.
2. Of little merit. "This proposed new feature seems rather
marginal to me." 3. Of extremely small probability of winning. "The power supply was rather marginal
anyway; no wonder it fried."