The phrase "crawl with" typically implies an overabundance or infestation of something. Some antonyms for "crawl with" could include terms such as "sparse," "empty," "depleted," "vacant," or "barren." For example, if someone were to say that a certain area was crawling with mosquitoes or other insects, the antithesis of this might be to describe another area as being practically devoid of any bugs. Similarly, a place that is crawling with people might be contrasted with one that is relatively uncrowded or sparsely populated, such as a deserted beach or a remote wilderness area.