相聯

to interact / interrelated

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 ally / to unite / to join / (poetry) antithetical couplet

closely interrelated / intimately related

mutually related / interconnected