ジュウ, あ.てる, み.たす, あつ, のぶ, まさ, みち, みつ, よし

allot, fill

JLPT1 G7 S6 F949

As per ?# as described in (fetus filling then passing through the birth canal) + person (for emphasis/clarification) → fetus filling the birth canal → *fill* → *fulfill*; *satisfy* → *apply*; *allot*; *allocate* (← satisfy a requirement in need of being fulfilled) → *assign* (← allocate).

[Full Kanji Etymology List]