One among the Shang dynasty versions of the grapheme 禘 dì, verbal form of 帝 Dì ("Deity"), whose meaning is "to divine, to sacrifice (by fire)". The modern standard version is distinguished by the prefixion of the signifier for "cult" (礻shì) to the nominal Dì. Sources: Didier, John C. (2009). "In and Outside the Square: The Sky and the Power of Belief in Ancient China and the World, c. 4500 BC – AD 200". Sino-Platonic Papers. Victor H. Mair (192). Volume II: Representations and Identities of High Powers in Neolithic and Bronze China, p. 107 ff. &amp; Pankenier, David W. (2013). Astrology and Cosmology in Early China. Cambridge University Press. ISBN 1107006724. p. 103.
It may represent a fish entering the square of the north celestial pole (dīng 口, archaic of 丁, i.e. the square tool as well as the north celestial pole). Source: Didier (2009). Volume III: Terrestrial and Celestial Transformations in Zhou and Early-Imperial China, p. 6.
Otherwise it may represent 定 dìng, i.e. the Square of Pegasus constellation or Celestial Temple, when aligning with Dì and thus framing true north. Source: Pankenier (2013). Astrology and Cosmology in Early China. pp. 138–148.

Also 鼎 dǐng ("cauldron", "thurible") may have derived from the verbal dì. Source: Pankenier (2013). pp. 136–142.
Own work
Aethelwolf Emsworth.