Another lovely English word that foreigners seem reluctant to use. Iffy is a more informal way of saying doubtful or uncertain. But in fewer letters it encapsulates the meaning beautifully.
Marketa was thinking of an outdoor wedding but it will have to be before September because the weather is pretty iffy in that month.
The plan to open branches in the interior of the country is an iffy one. First, it will involve a huge investment and second, we have no client base there.