Simple past tense and past participle of shorten.(verb)
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Use "shortened" in a sentence
"And except those days should be shortened, there should no flesh be saved: but for the elect's sake, those days shall be shortened_. ""
"After serving a quarter of his sentence, Katsav could become eligible for short furloughs and even apply to have his term shortened."
"Only in the sixth edition published in 1872 was the title shortened to exclude the “on” as a capitulation to reality since so many people by that point had already been misquoting the title."