何以见得

how can one be sure?

surname He

what / how / why / which / carry

(literary) why / how

old variant of 以[yi3]

old variant of 以[yi3]

abbr. for Israel 以色列[Yi3 se4 lie4]

to use / by means of / according to / in order to / because of / at (a certain date or place)

to see / to meet / to appear (to be sth) / to interview / opinion / view

to appear / also written 現|现[xian4]

to seem / to appear / (in a negative or interrogative sentence) to be sure

to obtain / to get / to gain / to catch (a disease) / proper / suitable / proud / contented / to allow / to permit / ready / finished

structural particle: used after a verb (or adjective as main verb), linking it to following phrase indicating effect, degree, possibility etc

to have to / must / ought to / to need to