The spelling of the word "serrago" can be explained using IPA phonetic transcription. The first syllable, "ser," is pronounced /sɛr/, rhyming with "air." The second syllable, "ra," is pronounced /rɑ/, similar to the "ah" sound in "father." The final syllable, "go," is pronounced /ɡoʊ/, rhyming with "dough." Together, the word is pronounced /sɛr.rɑ.ɡoʊ/. While the origin and specific meaning of "serrago" is unclear, understanding its phonetic spelling can aid in its proper pronunciation.
Sawdust.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.