入微

入微	rù wēi	down to the smallest detail; thoroughgoing; fine and detailed
入	rù	to enter; to go into / to join; to become a member of / (bound form) to conform to (as in 入时) / abbr. for 入声 / (on product packaging, after {number n} + {classifier}) containing (n pieces) (from Japanese 入 "iri")
微	Wēi	surname Wei / ancient Chinese state near present-day Chongqing / Taiwan pr. [Wei2]
微	wēi	tiny / miniature / slightly / profound / abtruse / to decline / one millionth part of / micro- / Taiwan pr. [wei2]