遣唐使 （ケントウシ） envoy to Tang China

遣欧 （ケンオウ） dispatching to Europe (e.g. an envoy), sending to Europe

先遣 （センケン） sending ahead

差遣 （サケン） dispatch, despatch, sending

使う （つかう） to use (a tool, method, etc.), to make use of, to put to use, to use (a person, animal, puppet, etc.), to employ, to handle, to manage, to manipulate, to use (time, money, etc.), to spend, to consume, to use (language), to speak

遣わす （つかわす） to send, to dispatch, to despatch, to bestow (favour, etc.), to grant (e.g. pardon)

遣る （やる） to do, to undertake, to perform, to play (a game), to study, to send, to dispatch, to despatch, to put, to move, to turn (one's head, glance, etc.), to give (esp. to someone of equal or lower status), to let have, to present, to bestow, to confer, to make (a vehicle) go faster, to run (a business), to keep, to be engaged in, to practice (law, medicine, etc.), to practise, to have (food, drink, etc.), to eat, to drink, to smoke, to hold (a performance), to perform, to show, to ease (one's mind), to harm, to injure, to kill, to have sex, to fuck, to bang, to live, to get by, to get along, to do ... completely, to do ... broadly, to do ... to a great distance, to do ... for (someone of equal or lower status), to do ... to, to make active efforts to ...

やる気 （やるき） will (to do something), drive, motivation, enthusiasm, eagerness