The phrase "deepen the division" is grammatically correct and is commonly used in written English.
It means to make a difference or divide between two groups or individuals even greater or more significant. Example: The president's controversial statements only served to deepen the division between the two political parties.
The rejection of Mr. Simelane is also expected to deepen the division between the courts and Mr. Zuma and his supporters, who have in recent weeks suggested that the judiciary was impinging on functions of the executive branch.
Meanwhile, it helps further convince white supremacists that the president is on their side, and will surely deepen the division between Trump supporters and detractors nationwide.
That may further deepen the divisions in the region.
The anger of the past few months did not deepen the divisions between liberals and conservatives there.
But the effect, some fear, could be the reverse: such deals might deepen the divisions within ASEAN, and weaken its ability to bargain collectively with outsiders.
But then it opted for an approach that many fear will deepen the divisions in a society already ill at ease with itself.
Mrs. Clinton said she feared that Mr. Ashcroft would deepen the divisions that already existed in the country over emotion-laden issues like abortion and civil rights.
General Sisi's candidacy would further deepen the divisions between the many Egyptians who believe a firm hand is needed to steer the country, and Islamists bearing the brunt of state suppression of dissent.
Many Orthodox Jewish organizations reached a similar conclusion, deepening the division between the religiously devout and the secularists.
It also risked deepening the division between the Obama administration and the intelligence community, which have been briefing against one another throughout the week.
Perhaps not, but the Tory leadership and the Tory campaign have deepened the division between Scotland and England as no other party has done, including the SNP.
