noun, noun, used as a suffix
allergy
Medical condition; also used as a suffix in compounds like 花粉アレルギー (pollen allergy).
from German Allergie
私は猫アレルギーがあるので、猫を飼えません。
I have a cat allergy, so I can't keep a cat.
花粉アレルギーの季節になると、くしゃみが止
When pollen allergy season comes, I can't stop sneezing.
noun, noun, used as a suffix
aversion; strong dislike
Figurative use; often followed by がある or used as a suffix to express a strong personal distaste for something.
彼は勉強アレルギーで、机に向かうとすぐ眠くなる。
He has an aversion to studying and gets sleepy as soon as he sits at his desk.
私は早起きにアレルギーがある。
I have a strong dislike for getting up early.