full-out
UK[ˌfʊl ˈaʊt]US[ˌfʊl ˈaʊt]
adj
using or involving the maximum amount of effort, energy, or speed
adv
with the maximum amount of effort, energy, or speed
Morpheme Breakdown
full
out
full
complete
out
to the utmost
Etymology
The compound "full-out" is a modern English formation, combining two native Germanic elements to create an intensive adverbial and adjectival phrase. The word "full," with Proto-Indo-European roots meaning "full, plenary," provides the core sense of completeness. The particle "out," from a PIE root meaning "up, out, away," is used here in its intensive sense of "to the fullest extent" or "completely," a development seen in other phrases like "all-out." The logic of the compound is transparent: to do something "full-out" is to extend one's effort completely outward, leaving nothing in reserve, thus reaching the maximum possible level.
Analysis
Structure: full (complete) + out (to the utmost)
full: From Old English full, meaning "entire, complete, abundant." It functions as an adjective/adverb root conveying totality.
out: From Old English ūt, meaning "outward, away, to the utmost point." It functions as an adverbial particle intensifying the preceding element.
Examples
The team launched a full-out offensive in the final minutes of the game.
She trained full-out for the marathon, leaving no room for half-measures.
The company is engaged in a full-out campaign to dominate the market.