逓
テイ, かわ.る, たがいに

relay, in turn, sending

JLPT1 G7 S10 F1957

虒# is 虎 tiger + 厂 cliff/shape indicator → mythical animal conceived of as crawling on its belly, in sequential motion, one leg at a time. 遞 adds 辵 movement/action indicator → move sequentially, in *relay* or stages → *stage*.

[Full Kanji Etymology List]