"In the run-up to the ECB meeting on Jan. 22 we expect more euro short positions to be put in place. So while the euro has fallen, we think there is further room, given expectations that QE may be announced at that meeting,'' said Yujiro Goto, a currency strategist at Nomura, London.
Data on Wednesday showed consumer prices in the euro zone fell in December from a year earlier, marking the first annual decline since 2009. That only cemented market expectations the ECB will launch a bond buying program at its policy meeting on Jan. 22.
Read MoreEuro zone deflation: Why it matters
"Expectations that the ECB will start quantitative easing are strengthening. Some people say it could fall to around $1.15,'' said Kyosuke Suzuki, director of forex at Societe Generale in Tokyo.
In contrast, the U.S. Federal Reserve is still expected to lift interest rates, although the timing remains unclear. Minutes of the December meeting offered no new clues on when the Fed will move, though most economists expect it around mid-year.
"The focus now should shift back to the data, with the next few months of releases key in determining whether rate hikes will begin in June as we, along with most FOMC members, expect," analysts at BNP Paribas wrote in a note to clients.
The dollar climbed back above 119.75 yen, pulling away from a three-week trough of 118.36 reached on Tuesday. Weakness in the euro kept the dollar index at nine-year highs. The index last traded at 92.234, near the peak of 92.265 set overnight.
The dollar moved higher after a better-than-expected U.S. jobs report from ADP on Wednesday, which bolstered expectations of a good non-farm payrolls report on Friday. Forecasts are the economy added 240,000 jobs in December.
"Any number above 200,000 should keep the broad dollar strength trend in place,'' said Nomura's Goto.