English

icebow

Blend of ice + rainbow.

Proto-Indo-European *h₁eyH- ‘ice’

…

Proto-Germanic *īsą

Proto-West Germanic *īs

Old English īs

Middle English hyse

English ice

Proto-Indo-European *bʰewgʰ- ‘to bend’

…

Proto-Germanic *regnabugô

Proto-West Germanic *regnabogō

Old English reġnboga

Middle English reynbowe

Today it means

noun An atmospheric phenomenon resembling a rainbow but associated with ice crystals.

Language periods are conventional ranges, not dates for this word.