The phrase "doth take off" means to remove, eliminate, or strip away. The antonyms or opposite words for this phrase can be 'add on, include, retain, or attach.' When you add something, it is the opposite of taking it off. Inclusion refers to keeping something intact or as it is, rather than removing it. Similarly, when you retain something, you hold onto it, rather than removing it completely. And when you attach something, you are adding it to something else, rather than removing it. Therefore, in contrast to "doth take off," these words signify the application of something new or the preservation of something old.