IPA: /nɒnˌæl.əˈdʒɛn.ɪk/
KK: /nɑnˈælərdʒɪk/
Not causing allergies or allergic reactions.
This fabric is nonallergenic, making it safe for people with sensitivities.
Nonallergenic → It is formed from "non-" (meaning not) and "allergenic" (from Greek "allos" meaning other and "ergen" meaning to work or produce). The word "nonallergenic" means not producing an allergic reaction.
Think of 'not' ('non-') causing an 'allergic reaction' ('allergenic') — that's why nonallergenic means something that does not cause allergies.