1. 长期的；持续很久的；时间长的
A prolonged event or situation continues for a long time, or for longer than expected.

1. drawn out or made longer spatially

e.g. 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

Synonym: elongatedextendedlengthened

2. relatively long in duration
tediously protracted

e.g. a drawn-out argument
an extended discussion
a lengthy visit from her mother-in-law
a prolonged and bitter struggle
protracted negotiations

Synonym: drawn-outextendedlengthyprotracted