'allergy-resistant' originates from the combination of 'allergy' and 'resistant', where 'allergy' refers to a hypersensitive reaction to certain substances, and 'resistant' means having the ability to withstand or oppose.

'allergy' comes from the Greek word 'allergia', meaning 'other work', and 'resistant' from the Latin 'resistere', meaning 'to withstand'.

Initially, 'allergy' referred to any altered reaction, but now it specifically means hypersensitivity. 'Resistant' has maintained its meaning of opposition or endurance.