English

anallergenic

From an- + allergenic.

Proto-Indo-European *h₂en- ‘on, onto’

Proto-Germanic *ana- ‘on’

Proto-West Germanic *ana- ‘Forming verbs and adjectives from participles…’

English an-

Today it means

adj Free of allergens; not allergenic.

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

Etymograph / anallergenic