unpredictable

Usually I would expect a reaction from Spurs but they are so unpredictable that I don't know what will happen.

Life's turns are unpredictable, but so are your pet's random bursts of joy.

"It’s volatile, unpredictable and is driven by speculation, none of which makes for a sleep-at-night investment."

This makes the genome unstable, with unpredictable consequences for the cells edited by the technique.

MYC regulates roughly 15 percent of the estimated 20,000 genes in the human body, meaning it could have unpredictable downstream effects involving thousands of genes.