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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
この道具は使いやすい。
This tool is easy to use.
彼は部下を使うのが上手だ。
He is good at managing his subordinates.
お金を使いました。
I spent money.