the world > relative properties > quantity > greatness of quantity, amount, or degree > [adverb] > at, in, or to maximum amount or degree
1949 M. Mead xiii. 275 Maximumly efficient and pleasant plumbing.
1981 25 Feb. 21/2 Every door and window was maximumly secure.
1998 26 Dec. b4 Cosmic Capers offers maximum flexibility for the maximumly confused.