na-adjective, noun
Describes tasks, problems, or matters that are not difficult or burdensome. Somewhat formal and less common in everyday speech than 簡単 or 容易.
この作業は軽易なので、すぐに終わるでしょう。
This task is easy, so it will probably be finished quickly.
軽易な問題から取り組むことにした。
I decided to start with the simple problems.
Compound of 軽 (light, easy) and 易 (easy, simple). The exact historical derivation is uncertain, but the meaning follows directly from the kanji.