opposer

noun

opposer

noun

Etymology From oppose + -er.

1

One who opposes, one who shows opposition.

For example, after the opposer had objected to the opposee's plan to drive the car, the opposee suggested, "We can take turns driving the car."1984, Catherine Garvey, Children's Talk, page 145:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.