[1865–70; endorse + -ation]This word is first recorded in the period 1865–70. Other words that entered Englishat around the same time include: black belt, figure skating, goulash, maverick, springboard-ation is used to form nouns from stems ending in -ate (separation) and, on this model, to form nouns from stems of other origin (starvation). Other words that use the affix -ation include: complementation, concentration, neutralization, reservation, sensitization