U undermine saper, miner Political pundits deemed that the 2014 US mid-term elections could result in a Republican-led Senate joining House Republicans to pass laws unacceptable to Obama, such as undermining Obamacare. underpin être à la base de Tech-industry analysts say recent research into the reliability of medical trials using the cryptographic technology called the "blockchain", which underpins bitcoin, shows that the latter has applications well beyond cash and currency. unemployed sans emploi, au chômage syn. jobless According to a Washington Post poll conducted in December 2013, six in ten US workers said they were worried about joining the ranks of the millions of unemployed, many of whom live in utter despair. unemployment rate taux de chômage syn. jobless rate Economists reported that the unemployment rate in Greece stood at 25% in September 2015, and that some three-quarters of the unemployed had been jobless for more than a year. 145