Vara rokuti ruambamabwe (Petrology kuChirungu) riri kushandiswa pano kureva denhe reruzivo rinodzidzisa pamusoro pemabwe, kuwumbwa kwawo uye kupatsanurwa kwemapoka emabwe. Kune mhando dzemambwe nhatu dzinoti echikwatamabwe (ignenous), akawumbwa kubva pakutsindirana kwemadzikinyira (sedimentary), uye akashandurwa chimiro nehujoto nepuresha yakakwira (metamorphic). Chivakashure ruamba chiri kushandiswa kuturikira chivakamberi logy chinowanikwa kuEnglish mumazwi anodudza zvidzidzo zvnoti: biology, geology, physiology etc. Chivakamberi cheEnglish chekuti -logy chinoreva a speaking, discourse, treatise, doctrine, theory, science. Petrologist rinenge roturikirwa kunzi chiambamabwe. VaChewa vanoti muyambo (traditional stories and teachings, customs of a people). VaVenda vanoti luambo (n. language) kureva mutauro. Mamwe mazwi: amba (v. talk).