Words related to function

*bhrūg-, Proto-Indo-European root meaning "to enjoy," with derivatives referring to agricultural products.

It forms all or part of: brook (v.) "to endure;" defunct; fructify; fructose; frugal; fruit; fruitcake; fruitful; fruition; fruitless; frumentaceous; function; fungible; perfunctory; tutti-frutti; usufruct.

It is the hypothetical source of/evidence for its existence is provided by: Latin frui "to use, enjoy," fructus "an enjoyment, proceeds, fruit, crops;" Old English brucan "use, enjoy, possess," German brauchen "to use."
defunct (adj.)

"dead, deceased, extinct," 1590s, from Old French defunct (14c., Modern French defunt) or directly from Latin defunctus "dead," literally "off-duty," past-participle adjective from defungi "to discharge, finish," from de- "off, completely" (see de-) + fungi "perform or discharge duty" (see function (n.)).

dysfunction (n.)

"failure to function, abnormality or impairment of function," 1914, from dys- "bad, abnormal, difficult" + function (n.). Originally in anatomy and medicine; in sociology by 1949.

functional (adj.)
1630s, "pertaining to function or office," from function (n.) + -al (1), or from Medieval Latin functionalis. Meaning "utilitarian" is by 1864; specific use in architecture is from 1928. Related: Functionally; functionality.
functionary (n.)
"one who has a certain function, one who holds an office," 1791, from or patterned on French fonctionnaire, a word of the Revolution; from fonction (see function (n.)). As an adjective in English from 1822, "functional." Related: Functionarism.
fungible (adj.)
"capable of being used in place of another; capable of being replaced," 1818, a word in law originally, from Medieval Latin fungibilis, from Latin fungi "perform" (see function (n.)) via phrases such as fungi vice "to take the place." Earlier as a noun (1765).
malfunction (n.)

"a faulty functioning, a failure to function as expected," 1827, from mal- "bad, badly, wrong" + function. As a verb, "to fail to function normally or as expected," by 1888. Related: Malfunctioned; malfunctioning.

perfunctory (adj.)

"done mechanically or without interest or zeal and merely for the sake of being rid of the duty of doing it; done so as to conform to the letter but not the spirit," 1580s, from Late Latin perfunctorius "careless, negligent," literally "like one who wishes to get through a thing," from Latin perfungus, past participle of perfungi "discharge, busy oneself, get through," from per "through" (from PIE root *per- (1) "forward," hence "through") + fungi "perform" (see function (n.)). Related: Perfunctorily.