What is another word for down cold?
Pronunciation: [dˌa͡ʊn kˈə͡ʊld] (IPA) 
"Down cold" is an idiom that describes a person's ability to perfectly understand or have a thorough knowledge of something. There are several synonyms that can be used for this phrase, such as "mastered," "perfected," "flawlessly executed," "completely familiar with," and "possessing excellent grasp of." These words convey the idea of total understanding and competence in a particular area or skill. Other phrases that can be used as synonyms for "down cold" include "on lock," "pat," "inside out," "like the back of one's hand," and "thoroughly rehearsed." Using these synonyms in writing or speech can add variety and depth to your language.
