完全懂得

to understand completely

to finish / to be over / whole / complete / entire

complete / whole / totally / entirely

complete; whole / totally; entirely

all / whole / entire / every / complete

to understand / to comprehend

to understand / to know / to comprehend

to understand; to know; to comprehend

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