the.com/complete
The moment nothing more can be added, only ruined by additions.
means Having every necessary part, with nothing missing or left to finish.
from From Latin complere, to fill up, built from com- (fully) and plere (to fill) — the same plere lurking in plenty and replete.
Quiet cousinCompliment shares the root, originally meaning to fulfill courtesy.
Math twistA complete set holds all its own limits.
False siblingComplete and finished mean done, but finished can hint at doomed.