"causing or tending to cause disruption," 1862; see disrupt + -ive. From 1840 in reference to electrical discharges (in this sense probably from French). By 1876 as "produced by disruption." Related: Disruptively; disruptiveness.
"break or burst asunder, separate forcibly." 1650s, but rare before c. 1820, from Latin disruptus, past participle of disrumpere "break apart, split, shatter, break to pieces," from dis- "apart" (see dis-) + rumpere "to break," from PIE root *runp- "to break" (see corrupt (adj.)). Or perhaps a back-formation from disruption. Earlier was disrump (1580s). Related: Disrupted; disrupting.
word-forming element making adjectives from verbs, meaning "pertaining to, tending to; doing, serving to do," in some cases from Old French -if, but usually directly from Latin adjectival suffix -ivus (source also of Italian and Spanish -ivo). In some words borrowed from French at an early date it has been reduced to -y (as in hasty, tardy).
<a href="https://www.etymonline.com/word/disruptive">Etymology of disruptive by etymonline</a>
Harper, D. (n.d.). Etymology of disruptive. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/disruptive