unsuccessful

His efforts to dismantle the health care law during his first term were unsuccessful.

The judiciary-run Mizan News Agency said prison officials immediately took action to save the Swiss citizen's life, but their efforts were unsuccessful.

Claire's son Leo, now four, received a liver transplant at five months old after several unsuccessful attempts.

China has made significant efforts to establish a domestic Atlantic salmon industry, but these attempts have largely been unsuccessful due to technical challenges and environmental constraints.

After all, bottom-up attempts by the Bush and Obama administrations to negotiate with Pyongyang proved to be both laborious and unsuccessful.