firn

n. 粒雪, 积雪

firn

n.（名词）
Granular, partially consolidated snow that has passed through one summer melt season but is not yet glacial ice.Also called old snow
粒雪，万年雪：经过一个夏季的溶化期但仍未成冰川的粒状且部分沉固的雪也作 old snow

来源：
German
德语
from German dialectal [of last year]
源自 德语方言 [去年的]
from Old High German firni [old]
源自 古高地德语 firni [旧的，老的]