nine-yard
UK[ˈnaɪn jɑːd]US[ˈnaɪn jɑːrd]
adj
Of or relating to the full extent, effort, or commitment; complete, thorough.
adj
(idiomatic, informal) Used to describe something done with maximum effort or to the fullest degree.
Morpheme Breakdown
nine
yard
nine
numeral
yard
unit of measurement
Etymology
The compound "nine-yard" is a modern American idiom whose literal components are straightforward: the numeral "nine" and the unit "yard." Its figurative meaning, however, stems from mid-20th century military slang, specifically from ammunition belts for machine guns which were nine yards in length. Using the entire belt signified expending all one's resources in a final, maximum effort. The logic of the idiom thus evolved from a concrete, measurable quantity representing a full supply into an abstract adjective describing total commitment or thoroughness, similar to the phrase "the whole nine yards."
Analysis
Structure: nine (numeral) + yard (unit of measurement)
nine: From Old English nigon, of Germanic origin; related to Dutch negen and German neun, from an Indo-European root shared by Latin novem and Greek ennea. Functions as a numeral.
yard: From Old English geard, meaning 'stick, rod, measure of length', of West Germanic origin; related to Dutch gard and German Gerte. Functions as a noun denoting a unit of linear measurement.
Examples
She gave it the nine-yard effort to finish the project on time.
For his final match, the coach prepared a nine-yard strategy, leaving nothing to chance.
They went the whole nine yards for the wedding, sparing no expense.