"morning," 12c. in compounds (morge-sclep "morning-sleep," morgewile "period around daybreak"); mid-13c. as morewe; c. 1300 as morwe; a shortened variation of morewen "morrow" (see morn). It was formerly common in the salutation good morrow (late 14c.).
late 14c., "tendency to change, inconstancy," from Old French mutabilité, from Latin mutabilitas, from mutabilis "changeable" (see mutable).
It is the same!—For, be it joy or sorrow,
The path of its departure still is free;
Man's yesterday may ne'er be like his morrow;
Nought may endure but Mutability.
[Shelley, from "Mutability," 1816]
"gad about, spend time in frivolous pleasure-seeking, especially with the opposite sex," 1809, of uncertain origin, perhaps a playful elaboration of gallant in an obsolete verbal sense of "play the gallant, flirt, gad about." Related: Gallivanted; gallivanting.
Young Lobski said to his ugly wife,
"I'm off till to-morrow to fish, my life;"
Says Mrs. Lobski, "I'm sure you a'nt",
But you brute you are going to gallivant."
What Mrs. Lobski said was right,
Gay Mr. Lobski was out all night.
He ne'er went to fish, 'tis known very well
But where he went I shall not tell.
["Songs from the Exile," in "Literary Panorama," London, 1809]
1520s, "science and art of government," from politic (n.) "the political state of a country or government (early 15c.), from Old French politique and Medieval Latin politica; see politic (adj.). The plural form probably was modeled on Aristotle's ta politika "affairs of state" (plural), the name of his book on governing and governments, which was in English mid-15c. as (The Book of) Polettiques or Polytykys. Also see -ics.
Politicks is the science of good sense, applied to public affairs, and, as those are forever changing, what is wisdom to-day would be folly and perhaps, ruin to-morrow. Politicks is not a science so properly as a business. It cannot have fixed principles, from which a wise man would never swerve, unless the inconstancy of men's view of interest and the capriciousness of the tempers could be fixed. [Fisher Ames (1758-1808), "British Alliance," in the Boston Repertory, November 1806]
The sense of "political actions or practice" is from 1640s. Meaning "political allegiances or opinions of a person or party" is from 1769.