1590s, from Latin surgere "to rise" (see surge (n.)). In psychology from 1933.
Online Etymology Dictionary, © 2010 Douglas Harper
Examples from the Web for surgent
Such sentences reveal a Deity who is not only manifest Character, but surgent and importunate Feeling.
It was only Aram's pre-occupation with Assyria now surgent on the northern flank, which allowed Israel these easy victories.