Know why cattywampus was trending last week?
the full range or compass of something; a range from one extreme to the other
Medieval Latin gamma 'G' + ut 'lowest note'
1520s, originally, "lowest note in the medieval musical scale," in the system of notation devised by Guido d'Arezzo, contraction of Medieval Latin gamma ut, from gamma, the Greek letter, indicating a note below A, + ut, the low note on the six-note musical scale that took names from corresponding syllables in a Latin hymn for St. John the Baptist's Day:
Ut queant laxis resonare fibrisetc. Gamut came to be used for "the whole musical scale;" the figurative sense of "entire scale or range" of anything is first recorded 1620s. When the modern octave scale was set early 16c., si was added, changed to ti in Britain and U.S. to keep the syllables as different from each other as possible. Ut later was replaced by more sonorous do (n.). Cf. also solmisation.
Mira gestorum famuli tuorum
Solve polluti labii reatum,
The gamut of a monitor is the set of colours it can display. There are some colours which can't be made up of a mixture of red, green and blue phosphor emissions and so can't be displayed by any monitor.