1. "Dia" is pronounced as "DEE-ah." The "i" is pronounced like the "ee" sound in "feet," and the "a" is pronounced like the "ah" sound in "father."
2. "Dhuit" is pronounced as "GWIT." The "dh" is pronounced like the "g" sound in "go," and the "ui" is pronounced like the "i" sound in "sit."
Put together, the pronunciation of "Dia dhuit" is "DEE-ah GWIT."