そらみつ

Etymology
First attested in the  (712 ).

Original derivation likely. Theories include:
 * The  (720 ) derives this pillow word from 🇰🇲.
 * Mi1tu is most likely, basis of modern and . By this derivation, "sky-filling or -spreading", rather than "sky-seen", is a more likely interpretation for this pillow word.
 * Mi1tu is likely a pun on, referring to the port in Naniwa, present-day Osaka, where it was the main hub for government ships.

Adnominal

 * 1) a  of uncertain meaning, allusion to