チュウ 
なか 
() go-between () relationship
   
なか (n) relation, relationship
ちゅうかい (n,vs,adj-no) agency, intermediation
なかま (n) company, fellow, colleague, associate, comrade, mate, group, circle of friends, partner
なかまいり (n,vs) joining a group
ちゅうさい (n,vs,adj-no) arbitration, intercession, mediation
なこうど (n) (1) go-between, matchmaker
なかなおり (n,vs) reconciliation, make peace with
なかがい (n) brokerage
なかよく (adv,n,vs) making friends with, getting along well with, on cordial terms
なかよし (n,adj-na) intimate friend, close friend, bosom buddy, chum

Links: KanjiDic: EDict : Wikimedia
Etymologies: 中文字譜 : 説文解字