sigil

The word 'sigil' traces its lineage directly to Latin sigillum, a diminutive of signum (sign, mark). Signum itself has a deep Indo-European heritage, likely from the root sekw-, meaning "to follow" or "to point out," which also gives us 'sign' and 'signal.' The specific magical connotation of 'sigil' developed in Medieval and Renaissance occult traditions, where a sigillum referred to a symbolic seal or diagram believed to summon or control spiritual entities. Thus, the word's journey encapsulates a shift from a general "small sign" to a specialized term for a potent, inscribed magical symbol.

This word is a simplex loanword. It entered English as a whole unit from Latin sigillum, meaning "a small sign, seal, or figure." The Latin word is a diminutive form of signum, meaning "sign, mark."