also: うすごおり
noun
thin ice
Refers to a thin layer of ice, often on a road or water surface. Can also be used metaphorically for a precarious situation.
池に薄氷が張っていた。
Thin ice had formed on the pond.
薄氷を踏む思いで試験の結果を待った。
I waited for the exam results feeling like I was walking on thin ice.
Compound of 薄 (thin) and 氷 (ice). The reading はくひょう is the on'yomi reading, while うすごおり is a kun'yomi compound reading.