indispensably: to such a degree that it is too important not to do or have

eg. He took the opportunities of paying the parting civilities which he deemed indispensably necessary.

irksome: annoying

eg. I think we may flatter ourselves that your Hunsford visit cannot have been entirely irksome.

footing: the fact of standing firmly on a slope or other dangerous surface.

eg. You see on what a footing we are.

consternation: a feeling of worry, shock, or confusion

eg. He then handed her in, Maria followed, and the door was on the point of being closed, when he suddenly reminded them, with some consternation, that they had hitherto forgotten to leave any message for the ladies of Rosings.