Western and Gulf Arab nations have pledged more than US$2.4 billion (NX$2.8 billion) for UN aid efforts in Syria, where a near three-year civil war has left millions of people hungry, ailing or displaced.
The pledge arose from a UN appeal for US$6.5 billion (NZ$7.7 billion) in 2014, which was launched last month and is the largest in the organisation's history.
The world body estimates the conflict has reversed development gains in Syria by 35 years, with half its people now living in poverty.
But only around 70 percent of US$1.5 billion (NZ$1.7 billion) pledged at a similar meeting last year has reached UN coffers, hinting at donor fatigue with no end to the bloodshed on the horizon.
UN humanitarian chief Valerie Amos said all sides in the conflict had shown "total disregard for their responsibilities under international humanitarian and human rights law".
"Children, women, men are trapped, hungry, ill, losing hope," Amos told the 69 countries attending a donor conference held in Kuwait.
The Gulf state's ruling emir, Sheikh Sabah al-Ahmed al-Sabah, promised NZ$596 million in new aid, while the United States announced a contribution of NZ$453 million.
Qatar and Saudi Arabia pledged NZ$71 million each. The European Union pledged NZ$268 million and Britain NZ$196 million.
UN Secretary-General Ban Ki-moon said the total was more than NZ$2.8 billion.
Money raised last year in Kuwait was used by the United Nations to provide food rations, medicine, drinking water and shelters for people in Syria and surrounding countries.
The largest donations at that conference came from Gulf Arab governments, which have mainly backed Syrian rebels trying to oust President Bashar al-Assad.
Kuwait has avoided showing support for either side and has voiced concern about the sectarian nature of the conflict.
"Even under the best circumstances, the fighting has set back Syria years, even decades," said Ban, who chaired the conference.
"I am especially concerned that the sides are using violence against women and girls to denigrate and dehumanise their opponents. I call for an immediate end to these abuses, which harm individuals and undermine Syria's future."
Ban has previously expressed regret that not all the promised donations have been received from the last meeting, with 20-30 percent still lacking.
He told the gathering he hoped peace talks due to start in Switzerland on January 22 would bring the Syrian government and opposition to the negotiating table - although Assad's adversaries are deeply split over whether to attend.
"I hope this will launch a political process to establish a transitional governing body with a full executive powers, and most importantly, end the violence," he said.
He urged the opposition forces to come with a united delegation. He added organisers had not been able to finalise whether Iran, Syria's Shi'ite Muslim ally, would take part and was coordinating closely with Russia and the United States.
The World Food Programme (WFP) said on Tuesday it had delivered rations to a record 3.8 million people in Syria in December, but civilians in eastern provinces and besieged towns near the capital remain out of reach.
The UN agency voiced concern at reports of malnutrition in besieged areas, especially of children caught up in the fighting, and called for greater access.
Shooting forced the United Nations to abort a delivery of food and polio vaccines to one besieged district of Damascus after Syrian authorities said it should use a circuitous and dangerous route, a spokesman said on Wednesday.
Aid workers in Syria have accused authorities of hampering deliveries to opposition-controlled areas and threatening groups with expulsion. Damascus blames rebel attacks for aid delays.
The WFP says it needs to raise NZ$42 million every week to meet the food needs of people both inside Syria and in neighbouring countries.
US Secretary of State John Kerry said on Monday that Syria's government and some rebels might be willing to permit humanitarian aid to flow, enforce local ceasefires and take other confidence-building measures.