I assume you are referring to the use of the term in relationship to goals and projects and not the original description of a stone marking off miles on a road. While it is not actually an antonym for a milestone, the opposite could be considered to be "setback".
Chat with our AI personalities
Nadir
The plural of milestone is milestones. As in "the milestones mark the approximate distance".
yes clever is antonym and it's antonym is stupid, fool
Antonym for permanent: Temporary Antonym for abundant: Scarce
what is the antonym for full