つか.う つか.い -つか.い -づか.い 
() use () envoy
           
つかい (n) (1) errand, mission, going as envoy, (2) messenger, bearer, errand boy, errand girl, (3) familiar spirit, (n-suf,n-pref) (4) use, usage, user, trainer, tamer, charmer
つかいすて (n,adj-no) throwaway, disposable
つかいみち (n) a use, purpose to which something is put
つかいわけ (n,vs) proper use, using (different things) for different purposes
つかいかた (n) way to use something, treatment, management (of help)
つかう (v5u,vt) (1) to use (a thing, method, etc.), to make use of, to put to use, (2) to use (a person, animal, puppet, etc.), to employ, to handle, to manage, to manipulate, (3) to use (time, money, etc.), to spend, to consume, (4) to use (language), to speak, (5) (id) to take (one's lunch), to circulate (bad money)
つかわす (v5s,vt) to send, to dispatch, to despatch
ししゃ (n,adj-no) messenger, envoy, emissary
しせつ (n,adj-no) envoy, embassy, mission, delegate
しと (n,adj-no) apostle, disciple
しと (n) purpose for which money is spent, the way money is spent
しめい (n) mission, errand, message
しよう (n,vs) use, application, employment, utilization, utilisation
しようずみ (adj-no,n) already finished being used, second-hand, no longer used
しようしゃ (n) (1) user, consumer, (2) employer
しようにん (n) employee, servant
しようりょう (n) rent, hire

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