The antonyms for the word "de-escalating" are "escalating," "intensifying," "fostering" and "amplifying." Escalating means to increase or intensify something, while intensifying means to make something stronger or more pronounced. Fostering refers to the act of encouraging the development or growth of something, while amplifying means to increase the volume or intensity of something. These antonyms are used to describe situations where tensions, conflicts, or problems are made worse, rather than resolved. It is important to understand both the meanings and the synonyms of a word, as well as its antonyms, to have a complete understanding of language and its usage.