實不相瞞

truth to tell / to be quite honest...

real / true / honest / really / solid / fruit / seed / definitely

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

each other / one another / mutually / fret on the neck of a pipa 琵琶[pi2 pa5] (a fret on the soundboard is called a 品[pin3])

appearance / portrait / picture / government minister / (physics) phase / (literary) to appraise (esp. by scrutinizing physical features) / to read sb's fortune (by physiognomy, palmistry etc)

to conceal from / to keep (sb) in the dark