fix (v.)

late 14c., "set (one's eyes or mind) on something" (a figurative use), probably from Old French verb *fixer, from fixe "fixed," from Latin fixus "fixed, fast, immovable; established, settled," past-participle adjective from figere "to fix, fasten, drive, thrust in; pierce through, transfix," also figurative, from PIE root *dheigw- "to pierce, stick in;" hence "to fix, fasten."

Sense of "fasten, attach" is c. 1400; that of "to make (colors, etc.) fast or permanent" is from 1660s. The meaning "settle, assign" evolved into "adjust, arrange" (1660s), then "to repair" (1737), but this sometimes was objected to (see below). Sense of "tamper with" (a fight, a jury, etc.) is from 1790. As euphemism for "castrate a pet" it dates from 1930. Related: Fixed; fixing.

To fix is to make fast, or permanent; to set immoveably, &c.: hence, to fix a watch, is to stop it, or prevent it from 'going;' which, it must be admitted, is a very unsatisfactory mode of repairing that article. [Seth T. Hurd, "A Grammatical Corrector; or, Vocabulary of the Common Errors of Speech," 1847]

fix (n.)

"position from which it is difficult to move," 1809, American English, from fix (v.). Meaning "dose of narcotic" is from 1934, shortened from fix-up (1867, originally in reference to liquor). Meaning "reliable indication of the position of a ship, plane, etc." (by reference to fixed positions) is from 1902.

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Definitions of fix from WordNet
fix (v.)
restore by replacing a part or putting together what is torn or broken;
Synonyms: repair / mend / bushel / doctor / furbish up / restore / touch on
fix (v.)
cause to be firmly attached;
she fixed her gaze on the man
Synonyms: fasten / secure
fix (v.)
decide upon or fix definitely;
fix the variables
Synonyms: specify / set / determine / define / limit
fix (v.)
prepare for eating by applying heat;
fix breakfast for the guests, please
Synonyms: cook / ready / make / prepare
fix (v.)
take vengeance on or get even;
That'll fix him good!
Synonyms: pay back / pay off / get
fix (v.)
set or place definitely;
Let's fix the date for the party!
fix (v.)
kill, preserve, and harden (tissue) in order to prepare for microscopic study;
fix (v.)
make fixed, stable or stationary;
let's fix the picture to the frame
Synonyms: fixate
fix (v.)
make infertile;
Synonyms: sterilize / sterilise / desex / unsex / desexualize / desexualise
fix (v.)
influence an event or its outcome by illegal means;
fix a race
fix (v.)
put (something somewhere) firmly;
fix your eyes on this spot
Synonyms: situate / posit / deposit
fix (v.)
make ready or suitable or equip in advance for a particular purpose or for some use, event, etc;
I was fixing to leave town after I paid the hotel bill
Synonyms: prepare / set up / ready / gear up / set
fix (n.)
informal terms for a difficult situation;
he got into a terrible fix
Synonyms: hole / jam / mess / muddle / pickle / kettle of fish
fix (n.)
something craved, especially an intravenous injection of a narcotic drug;
she needed a fix of chocolate
fix (n.)
the act of putting something in working order again;
Synonyms: repair / fixing / fixture / mend / mending / reparation
fix (n.)
an exemption granted after influence (e.g., money) is brought to bear;
fix (n.)
a determination of the place where something is;
he got a good fix on the target
Synonyms: localization / localisation / location / locating