You know what it looks like… but what is it called?
TAKE THE QUIZ“Great Slave”
We have one entry that includes the term Great Slave.
Great Slave Lake
geographical namelake in the southeastern part of the Northwest Territories, Canada, receiving the Slave River on the south and draining into the Mackenzie River on the west area about 11,000 square miles (28,490 square kilometers)
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Merriam-Webster unabridged