Antonym for concentrate might be scatter, disperse, strew, daydream or wander.
Potent is a synonym of concentrated. You could also use the word concentrated. !
If you are looking for an antonym, a wonderful resource is a thesaurus. The...
There is no true antomym for "these". The closest I can come up with is "those".
According to Synonym.com which offers a wonderful search engine for Synonym and...
Some antonyms of "all" are "some" and "none." Thanks for -ing with me!