c. 1600, "state of being linked together," from Late Latin concatenationem (nominative concatenatio) "a linking together," noun of action from past participle stem of concatenare "to link together," from com "with, together" (see con-) + catenare, from catena "a chain" (see chain (n.)). As "a series of things united like links in a chain" from 1726.
it was caused by an improbable concatenation of circumstances
a complicated concatenation of circumstances
con
con-
conation
conative
concatenate
concatenation
concave
concavity
conceal
concealment
concede