against

/əˈɡɛnst/
preposition
  1. In opposition to someone or something.
    • The team played against their biggest rivals.
    • Many people voted against the new law.
    • She argued against the idea of cutting the budget.
  2. In contact with or touching a surface.
    • She pressed her hand against her chest.
    • He leaned his bicycle against the wall.
    • The rain beat against the window all night.
  3. In preparation for or as a protection from something.
    • They saved money against a rainy day.
    • The vaccine protects against the flu.
    • We need to insure the house against fire.
  4. Compared to or in contrast with something.
    • The red dress looked bright against her pale skin.
    • The dark trees stood out against the white snow.
    • Profits were up 10% against last year.
Antonyms
What does "against" mean? | whatsthatwordmean | whatsthatwordmean