best efforts
noun [ plural ]
ukus LAW (also best endeavours)
the greatest possible effort to achieve something or do something, especially when this is difficult:
use your best efforts to do sth The buyer shall use his best efforts to get an acceptable purchase contract for this property.
FINANCE
the greatest possible effort by a financial organization, such as an investment bank, to sell a company's new shares, when it does not have to promise to sell them all and it does not have to buy the shares it does not sell:
use your best efforts to do sth The national distributor has agreed to use its best efforts to sell shares of the fund.
best-efforts
adjective [ before noun ]
Many of this year's new loans have been done on a best-efforts basis.