What this suffix does
-timed forms compound adjectives that evaluate the timing of an action, statement, or event — whether it occurred at the right, wrong, or notable moment. Well-timed, ill-timed, badly-timed, perfectly-timed — each compound uses timing as a category of judgment. In English culture, where understatement and timing are prized social skills, -timed compounds carry significant evaluative weight. A well-timed remark is one that appears at exactly the right moment to have maximum effect; an ill-timed one lands at exactly the wrong moment and produces the opposite effect.