How to Spell against
against
against - preposition
- In opposition or hostility to
- Not in conformity with : contrary to
- In competition with
- As a basis for disapproval of
Source: Merriam-Webster Dictionary API
"spoke against his enemies"
against - thesaurus
Etymology
Middle English ayenest, ayenst, ayeinst, agaynste, alteration (with parasitic -t, perhaps originally from partial assimilation to a following article) of ayeines, ageynes, from ayein, ageyn again + -es -s