perseveringly

It is, writes Times theater critic Charles McNulty, a harmonizing with history that is “at once agonizingly harsh and perseveringly soulful.”

The bigger amazement is how they— and by extension we the audience — are able to harmonize with a history at once agonizingly harsh and perseveringly soulful.

But the old man sucked perseveringly at the bread between his toothless gums.

After taking the oath of office, Mr. Quang vowed in a televised speech to “resolutely and perseveringly fight to firmly defend the country’s independence, sovereignty, territorial integrity, the national interests and security.”

After taking the oath of office, Quang vowed in a televised speech to "resolutely and perseveringly fight to firmly defend the country's independence, sovereignty, territorial integrity, the national interests and security."