下学上達
かがくじょうたつ
beginning one's studies with something familiar and gradually increasing the depth of learning
下達 is read as かたつ (katatsu) and means commanding a subordinate.
かたつ
katatsu
かがくじょうたつ
beginning one's studies with something familiar and gradually increasing the depth of learning
彼は部下達に明晩攻撃すると告げた。
He told his men they would attack the next night.