使 vs 使用 vs 用（近义词）

1)The three verbs all mean "to use some instruments or some other things as the means to do something'".The object of 使 limited.使用 is more abstrac and mostly used to mean "be engaged in some activity with man power,material resources,capital,etc".用 is the most commonly used and can be applied to either concrete or abstract things
2)In the four example above.the obiect is the more ab.stract人(human being)or 钱(money),so 用 or 使用 is generally used.The difference betweer 用人 and 使用人才 is decided by the collocation of monosyllabic or disyllabic words.The case with 用钱 and 使用资金 is the same.Relatively abstract disyllabic objects like 人力(man power),物力(material resources),手段(means),语言(language)are mostly used with 使用，
3)Though used mostly with abstract objects,使用 can be applied to technological things such as 使用电脑(use computer),使用微波炉(use microwave),使用集成电路(use integrated circuit),使用武器(use weapons),etc.

1)用 and 使 are used to apply to concrete objects

1)The objects of 使 are rather unusual.with concrete things such as 使圆珠笔（写字）(write),abstract things such as 使劲(meaning 用力 (exert oneself)),all are very common in colloquial language,mostly in north China.The objects of 使 are limited,and not as general as 用.For instance,one can say 用汽车运输(transport by bus),but not 使汽车运输，etc
2)使 also means"to make,to cause",which is equivalent to 让，叫 but more literary and formal

1)用 can also mean "to eat or to drink,as a polite expression",e.g.请用点心(here's the pastry),请用茶(here's the tea)