How did the rebus principle allow Sumerian writing to represent names and sounds?

The rebus principle was a critical development that allowed the Sumerian language to evolve from a purely logographic system—which could only represent concrete objects—into a more versatile, partial phonetic script.12

By utilizing the rebus principle, scribes used a pictographic sign to evoke the sound of a word rather than the meaning of the object depicted. For example, if a specific concept or proper name was difficult to illustrate, a writer would select a sign for a different, easily picturable object that shared the same or a similar phonetic value.21

This transition enabled the script to represent abstract ideas, grammatical elements, and personal names. Because Sumerian words were largely monosyllabic, these signs typically functioned as syllables. For instance, a sign representing the word for "hand" (šu) could also be used to represent the phonetic syllable šu in other contexts. This innovation transformed the writing system into a word-syllabic script, providing the flexibility needed for complex administrative and literary expression.12