重疊

to overlap / to superimpose / to telescope / to run together / to duplicate / one over another / superposition / an overlap / redundancy / reduplication (in Chinese grammar, e.g. 散散步[san4 san4 bu4] to have a stroll)

to repeat / repetition / again / re- / classifier: layer

heavy / serious / to attach importance to

to fold / to fold over in layers / to furl / to layer / to pile up / to repeat / to duplicate

overlapping ranges of high mountains (idiom)

verb reduplication