(Latin: to fasten; to attach; from fixus, past participle of figere)

fixity (s) (noun), fixities (pl)
1. Something that is unchanging and stable: The man in the restaurant, sitting at a table not far way, had such a fixity of his eyes while he was staring at Susan that she became very upset.
2. Something which is not movable or changeable: The vacant house next door to Sam was considered a fixity because it could never be moved to a new location or even be modified so anyone could live in it.
fixture (s) (noun), fixtures (pl)
1. Something securely, and usually permanently, attached or appended, as to a house, an apartment building, etc.: The cottage with all of its special electrical fixtures was to be sold sometime during the next month.
2. A person or thing which has been established for a long time in the same place or position: After teaching more than 30 years in the same school, Mrs. Jackson was considered to be part of the fixture of the institution!
3. Various devices for holding parts in certain positions during welding, assembly, etc.: An anvil is one example of a fixture which a blacksmith can use to securely clamp metal objects and then to shape them with a hammer.
infix (s) (noun), infixes (pl)
Words, or word parts, inserted into the middle of other words: Is it possible that "thermo"; as in, "hydrothermotherapy" is an infix or would it be preferable to call it an "intrafix"?
infix (verb), infixes; infixed; infixing
1. To keep in the mind; to instill: The phrase "Thank you" was infixed in Mildred's head as a child by her mother; so, she never forgot to use it when people did nice things for her
2. To keep a fact, idea, etc. in the mind or the memory; to impress: Brushing teeth regularly is something which should be infixed in the brain because it is so very important!
3. In linguistics, to insert a linking element into the middle of a word: In the noun "acidophilus", the letter "o" is infixed into the center of the term between "acid" and "philus".
infixation (s) (noun), infixations (pl)
A bound morpheme or grammatical unit that never occurs by itself, but is attached or inserted within a root or a word stem as a sound or a letter: In the term "originally" the  infixation "al" is preceded by "origin" (the root) and "ly" (indicating the adverbial form of the term).
interfix (s) (noun), interfixes (pl)
The linking element which combines two word stems which then form a compound word: Interfixes are used in English; as in, "mile-o-meter" where the "o" is the interfix.
intrafix (s) (noun), intrafixes (pl)
The placement of parts , or word elements, within a compound term: Here are examples of intrafixes, ichthyoacanthotoxin where "acantho" is the intrafix; audiospectograph that includes "specto" as the intrafix; and electrocardiophonogram showing "cardio" as the intrafix.
intrafixation (noun), intrafixations (pl)
Compound elements that are placed into special terms: Examples of intrafixations include, acrohypothermy and aerothermodynamics.
medifixed (adjective) (not comparable)
A reference to an anther or other plant part which is attached by or at the middle.
omentofixation (s) (noun), omentofixations (pl)
In general, an operation in which one of the folds of the peritoneum connects the stomach with other abdominal organs that is fastened to some other tissue, especially one in which it is used as a circulatory bridge to reduce congestion or to provide vascular nutrition: The omentumfixation is a sheet of fat that is covered by the peritoneum or a smooth transparent membrane that lines the abdomen and doubles back over the surfaces of the internal organs to form a continuous sac.

The greater omentumfixation is attached to the bottom edge of the stomach, and hangs down in front of the intestines while its other edge is attached to the transverse colon.

The lesser omentumfixation is attached to the top edge of the stomach, and extends to the under surface of the liver.

postfix (s) (noun), postfixes (pl)
The addition of  a letter or group of letters to the end of a word; a suffix: Jane learned in her English class that the addition of the postfix ment as the last part of "arrange" formed a new word known as "arrangement".
prefix (s) (noun), prefixes (pl)
1. A group of letters that are added to the beginning of a word to modify its meaning: An example of a prefix is "un-" which when added to the word "happy" forms the term "unhappy".

Another prefix is "non-" added to "binding" which equals "nonbinding" or something which does not legally require that a person be forced to do anything; such as, a "nonbinding agreement".

2. A title that is placed in front of a person's name: "Dr. Smith", "Mrs. Jones" and "Mr. Smith" all demonstrate prefixes.
prefix (verb), prefixes; prefixed; prefixing
1. To put or to attach something before or in front of another element: When Joe Rogers completed his medical training, he was allowed to prefix his name as "Dr. Joe Rogers".

The author wrote a preface which was prefixed at the beginning of his book.

2. To settle or to arrange in advance: The manager of the store in New York made sure his employees prefixed the items with the correct $ amount and the ¢ suffix when it was applicable, for example when a shirt was on sale for $5.50¢ (5 dollars and 50 cents).
3. In grammar and vocabulary, to add part of a word to the front of another a word: To prefix "dis" in front of "believe" results in "disbelieve".
prefixation (s) (noun); prefixations (pl)
The formation of a word with an attachment to the front of a root or a word stem: Janet used some prefixations, like un at the beginning of "sightly", which produced "unsightly", and dis when writing "displeasure" which were useful when writing her story for the English essay competition.
reaffix, (verb), reaffixes; reaffixed; reaffixing
To attach, to fasten, to unite, or to join together again: When Clark wrote the wrong address on the label of the package he was going to mail, he took it off and reaffixed another one with the right information.

Related word families intertwined with "to place, placing, to put; to add; to stay; to attach" word units: pon-; prosth-; stato-; the-, thes-.