百思不解

to remain puzzled after pondering over sth a hundred times (idiom) / to remain perplexed despite much thought

hundred / numerous / all kinds of

to think / to consider

no; not so / (bound form) not; un-

to not understand / to be puzzled by / indissoluble

surname Xie

to divide / to break up / to split / to separate / to dissolve / to solve / to melt / to remove / to untie / to loosen / to open / to emancipate / to explain / to understand / to know / a solution / a dissection

to transport under guard

acrobatic display (esp. on horseback) (old) / variant of 懈[xie4] and 邂[xie4] (old)