Answer:
They should end up like this. 地+海 終+始 独+互 緩+緊 強+衰
地 CHI, JI - earth, land
海 KAI, umi - sea
終 SHUU, o(waru), o(eru) - end, finish
始 SHI, haji(meru), haji(maru) - start, begin
独 DOKU, hito(ri) - alone
互 GO, taga(i) - mutual, reciprocal, each other
緩 KAN, yuru(mu), yuru(i), yuru(yaka) - loose, slacken, slow, gentle
緊 KIN - hard, tight
強 KYOU, GOU, tsuyo(i), tsuyo(meru), shi(iru) - strong, force
衰 SUI, otoro(eru) - grow weak, decline, wane