This is the 1302nd most frequent Japanese word.
用い
"用い" means "use" or "employ."
The word '用いて' here means 'using' and indicates the employment of a particular language for a purpose.
このクラスでは、英語を用いて授業を進めます。
In this class, we proceed with the lesson using English.
The word '用いられる' here is the passive form and means 'to be used,' showing the application of the suggestion.
彼の提案は計画に用いられるだろう。
His suggestion will likely be used in the plan.
The word '用いられている' here means 'are used,' describing the ongoing use of methods in the craft.