The term "de taches" refers to the removal of stains. Antonyms for this word would be words that indicate the opposite of removing stains, such as "stain" or "dirty." Other antonyms could include "smudge," "blemish," or "mark." If one was looking to speak positively about stains or marks, synonyms could be "patina," "weathering," or "character." Overall, the antonyms for "de taches" clue us in to the opposite actions one could take regarding stains or marks, emphasizing either their removal or their importance in developing the character of an object.