拒絶反応

きょぜつはんのう

Common word

noun

(organ) rejection(yojijukugo)

unthinking dismissal, strong reaction (against)

拒	repel, refuse, reject, decline
絶	discontinue, sever, cut off, abstain, interrupt, suppress, be beyond, without match, peerless, unparalleled
反	anti-
応	apply, answer, yes, OK, reply, accept

しん

、

ちょうじょうてき

わだい

きょぜつはんのう

I don't know whether she believed me or not but in any case it seems she doesn't automatically dismiss talk of the supernatural