1.
Squarely means directly or in the middle, rather than indirectly or at an angle.
I kept the gun aimed ~ at his eyes.
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2.
If something such as blame or responsibility lies ~ with someone, they are definitely the person responsible.
Responsibility for success or failure lies ~ with the Nigerians.
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3.
If you face something ~, you face it directly, without trying to avoid it.
The management committee have faced the situation ~...
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