The phrase "a deep solidarity" is correct and usable in written English.
It can be used to express a strong sense of unity or support among individuals or groups, often in the context of social or political movements.
Example: "In times of crisis, we must come together in a deep solidarity to support one another and advocate for change."
Alternatives: "a strong unity" or "a profound connection".
He sent a message of "deep solidarity" to the families of the victims.
In a forthcoming book, Rosemarie Henkel-Rieger and I are arguing the time is right to move beyond charity and advocacy (Unified We Are a Force: Growing Deep Solidarity between Faith and Labor, forthcoming Spring 2016).
Perhaps the suffering of Asa and Fatima and their collective response to it can teach us a valuable lesson about what is missing from our fevered but flagging TB efforts: a sense of deep solidarity with those whose lives have been decimated by this disease.
Deep solidarity is not a matter of the relatively privileged trying to help the underprivileged and to solve their problems; rather, it is a matter of understanding that nothing will change unless we are addressing the problems of the world together.
Deep solidarity puts us in a mutual relationship with those we intend to support, helping us realize how much we share in common.
"It's a fight that must be waged both locally and globally, and requires deep solidarity among all organizations fighting for food sovereignty".
He brings a profound compassion and a controlled rage to accounts of moral obscenities, while also recording accounts of deep solidarity among the victims, even under terrifying circumstances.
French President Francois Hollande, also at the summit, expressed his country's "deep solidarity" with Italy in the face of the "odious attack".
He told reporters the US expresses "deep solidarity with our country's closest ally... [and] we offer our heartfelt condolences and prayers".
