hold hard · verb1
A verbal phrase composed of the words: hold ("grasp", "grip") and hard ("resistantly", "resolutely", "solidly", "steadfastly").
hold hard · verb2
A verbal phrase composed of the words: hold ("maintain or keep to a position or state") and hard ("resolutely", "steadfastly"). Originally an expression used in riding or driving, now general.
Etymology from Wiktionary, CC BY-SA 4.0.