upmost

From the tier of the upmost holes came at length the terrific burst of the heavy mines.

If he is not forestalled, his boat will be bottom upmost, or crushed like glass within the hour.

In less than half-an-hour the ruined amphitheatre was a moving mass of heads from the ground to its upmost storey.

Hence, in the present English, the different parts of the syllable most (in words like upmost) come from different quarters.

There were three enclosures; but the upmost one, though carefully folded, was unsealed, and engaged his attention first.