The art exhibition was made possible through generous private sponsorship.

sponsorship 是名词，来自动词 sponsor（赞助、资助）加上名词后缀 -ship（表示状态或关系）。sponsor 本身来自拉丁语 spondere（承诺），指提供资金或资源支持某项活动的人或组织。sponsorship 指"赞助行为"或"赞助关系"。