Antiquing is the process of collecting or searching for valuable antiques, such as furniture or art, from a certain period or era. The antonyms for antiquing would be modernizing or upgrading, where the focus would be on getting new and contemporary items instead of old, vintage pieces. Alternatively, one could also use the antonym decluttering as it would involve getting rid of unnecessary possessions and belongings rather than accumulating antique pieces. Some other antonyms for antiquing could include minimalizing or simplifying, as there is a different mindset and objective when it comes to reducing possessions versus expanding a collection of antique items.