Past tense of coattend; attended an event together with others.
Regular English past tense formation of 'coattend' using the '-ed' suffix, a productive feature since Old English.
Adding '-ed' to verbs is one of the most automatic processes in English—we don't even think about it, which is why regular verbs are so boring compared to irregular ones like 'go/went'!
Complete word intelligence in one call. Free tier — 50 lookups/day.