utmostly

Adverb

1. To the utmost.
   • "Better be very careful and utmostly cautious, sir," the negro warned him. - 1920, Jack London, Hearts of Three, Kessinger, published 2003, →ISBN, page 23:
   • The operation, however, by which the utmostly unfair deal entailed by utmost legality is nullified, cannot be successful at a lesser price than the infliction of an unfair deal on standard legality […] - 1953, Giuseppe...
   • Mike seemed about to weep. "Jubal, I am utmostly sorry." - 1961, Robert A. Heinlein, Stranger in a Strange Land, New York: Avon, →OCLC, page 113: