flummox (iou)

flummox verb. colloq. Also flummux. M19.
[Prob. dial., imit.]
verb trans. Bewilder, confuse, confound, perplex, disconcert. M19.
M. Amis I sat flummoxed and muttering like a superannuated ghost. absol.: L. MacNeice Voices that flummox and fool.
verb intrans. Give in, give up, collapse. US. M19.
D. P. Thompson If he should flummox at such a chance, I know of a chap..who'll agree to take his place.