정분합작용

Origin-division-union action — 正分合作用 [jeong-bun-hap-jagyong]

Etymology

正 (정) [chon] – straight, upright, erect;
分 (분) [bun] – to divide;
合 (합) [hap] – to unite;
作用 (작용) [jagyong] – action, operation, effect;