簡易
かんい · kani · JLPT N1 · na-adj
quasi-
簡易 = 簡 (simple) + 易 (easy): simple plus easy, so simplicity or easiness
The prefix 簡易 often marks a simplified or lighter version, as in 簡易版 (simplified edition). Its 'quasi-' sense is the same idea: a less complete form of something.