Huw said:sa-HWAA-gin.
No idea if that's right or where Gygax got it from, but it does look vaguely Meso-American.
Here's my dirty little list of mis-pronunciated words.Aeolius said:Baatezu: bay-AH-teh-zu or BAH-teh-zu
Bardiche: bar-DEESH
Chitin: KITE-in
Cuirass: KWEE-rass
Dweomer: DWEH-mer (rhymes with "hem her"), or DWIH-mer; sometimes DWEE-mer
Falchion: FAL-chun
Geas: GEE-ass, or GYASS (both with a hard "g")
Herb: ERB
Melee: MAY-lay
Sahuagin: sah-HWAH-gin
Vargouille: var-GWEEL
Vrock: vrahk