U.S. Federal Reserve Chair Jerome Powell gave his most explicit acknowledgment to date that steep interest-rate hikes could tip the U.S. economy into recession, saying one is possible and calling a soft landing "very challenging.”

"The other risk, though, is that we would not manage to restore price stability and that we would allow this high inflation to get entrenched in the economy,” Powell told lawmakers on Wednesday. "We can’t fail on that task. We have to get back to 2% inflation.”

The Fed chair was testifying before the Senate Banking Committee during the first of two days of congressional hearings. In his opening remarks, Powell said that officials "anticipate that ongoing rate increases will be appropriate,” to cool the hottest price pressures in 40 years.