IFFY

[adjective] -ier, -iest [informal] - uncertain, not completely healthy or not working correctlySharon is feeling a bit iffy about driving the car, if it isn't insured for her.The weather looks a bit iffy.MacDonald's injured back is still iffy so she may not play in tomorrow's game. -ify, -fy [suffix] - used to form verbs meaning to cause an increase in the stated quality; to becometo simplify (= make more simple)to intensify (= make more intense)to beautify (= make beautiful)The cement had solidified (= become solid).