iffy
adj. B2 Upper Intermediate US //ˈɪfi// UK //ˈɪfi// iffy
adj. describing something that is not certain or not very good. You use this when you are unsure if a plan will work or if a situation is safe.
adj. uncertain, doubtful, or of questionable quality. Informal in register; frequently used to describe the reliability of a person, the safety of a situation, or the success of a plan.
The weather is iffy for tomorrow, so we might stay home.
I'm not sure if the old bridge is safe to cross; it feels a bit iffy under the car.
While the initial data looked promising, the researchers remained cautious, noting that the long-term results were still iffy and required further observation.
From if + -y.