Amplify

verb

1. To render larger, more extended, or more intense.

   "amplify a microscopes"

2. To enlarge by addition or commenting; to treat copiously by adding particulars, illustrations, etc.; to expand.
3. To increase the amplitude of something, especially of an electric current.

   "amplify a signal"

4. To add content that is not present in the source text to the target text, usually to improve the fluency of the translation.