エン, あ.てる, あて, づつ, あたか.も
address, just like, fortunately
JLPT0 G7 S8 F5000
The relevant seal inscription form shows two figures bending beneath a cover (compare 丸) → *bend* (= make the body round) in concealment → *wind*. *As if*, *just like*, *addressed (to)* and *allotment* are borrowed meanings. In derivative characters, 宛 exerts either the conceptual influence "bend" (婉 惋 捥 etc.) or "circular" (埦 椀 碗 etc.).
[Full Kanji Etymology List]