初估

初估	chū gū	to make a preliminary estimate
初	chū	(bound form) at first; initially / (bound form) first; early / (bound form) (in lunar calendar dates, before numerals 1–10) days 1 to 10 of a month, as in 初三 "the third"
估	gū	to estimate
估	gù	used in 估衣