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comparative more essentially, superlative most essentially
in essence quotations examples
A doorknob of whatever roundish shape is effectively a continuum of levers, with the axis of the latching mechanism—known as the spindle—being the fulcrum about which the turning takes place. Applying a force tangential to the knob is essentially equivalent to applying one perpendicular to a radial line defining the lever.
2012 March, Henry Petroski, “Opening Doors”, in American Scientist, volume 100, number 2, pages 112–3