The phrase "didst take-off" is an archaic term that refers to the act of removing or taking off something. Its modern antonyms can be a range of words that convey the opposite meaning, such as wearing or putting on. Other antonyms for "didst take-off" are keep on, retain, and maintain. These words signify the act of preventing something from being removed or holding it in place. Additionally, synonyms such as attach, affix, or fasten can also be considered as antonyms for "didst take-off." Overall, the antonyms for "didst take-off" include words that embody the opposite actions, such as putting on, holding, and attaching.