"prolonged" in the verb sense

1. prolong, protract, extend, draw out

lengthen in time cause to be or last longer

"We prolonged our stay"

"She extended her visit by another day"

"The meeting was drawn out until midnight"

2. prolong, sustain, keep up

lengthen or extend in duration or space

"We sustained the diplomatic negotiations as long as possible"

"prolong the treatment of the patient"

"keep up the good work"

"prolonged" in the adjective sense

1. drawn-out, extended, lengthy, prolonged, protracted

relatively long in duration tediously protracted

"a drawn-out argument"

"an extended discussion"

"a lengthy visit from her mother-in-law"

"a prolonged and bitter struggle"

"protracted negotiations"

2. elongated, extended, lengthened, prolonged

drawn out or made longer spatially

"Picasso's elongated Don Quixote"

"lengthened skirts are fashionable this year"

"the extended airport runways can accommodate larger planes"

"a prolonged black line across the page"

Source: WordNet® (An amazing lexical database of English)

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