early 15c., "to prolong, extend," from O.Fr. proroger
(14c.), from L. prorogare
, lit. "to ask publicly," from pro
"before" + rogare
"to ask" (see rogation
). Perhaps the original sense in L. was "to ask for public assent to extending someone's term in office." Meaning "to discontinue temporarily" is attested from mid-15c.