やりとり (translations)→ activity business company conversation dealing encounter goings-on interchange
交渉 (translations)→ bargain contact diplomatic negotiate negotiation palaver talk
取引 (translations)→ deal deed dicker exchange management order position trade
取引き (translations)→ arrangement bargaining game pact
請求 (translations)→ request requisition
用事 (translations)→ appointment behalf nevermind thing toil want