damper
noun informal uk/ˈdæm.pər/ us/ˈdæm.pɚ/
put a damper/dampener on something 捣乱，搅乱，扰乱
to stop an occasion from being enjoyable
Both the kids were sick while we were in Boston, so that put a damper on things. 我们在波士顿时两个孩子都病倒了，于是一切都乱了套。