Answer:
丙 HEI - third in series
区 KU - district
反 HAN, HON, tane, so(ru) - anti-, bend back
不 FU, BU - negative
斤 KIN - unit of weight, loaf
Adding a tree (木 MOKU, BOKU, ki - tree) to these characters lets them branch out in a new direction!
柄 HEI, gara, e - pattern, design, handle
枢 SUU - pivot
板 HAN, BAN, ita - board
杯 HAI, sakazuki - wine cup
析 SEKI - divide, take apart, analyze