jack block

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noun Nautical.

a block used in raising or lowering a topgallant yard.

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Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Origin of jack block

First recorded in 1785–95

Words nearby jack block

jackass penguin, jackass rig, jackatar, jack bean, “Jack, Be Nimble”, jack block, jackboot, jackbooted, jack-by-the-hedge, jack chain, jack crevalle