against

Not agreeing with or supporting a plan, an idea or a person.

• Most people voted against the new plan.
  İnsanların çoğu yeni plana karşı oy verdi.
• I'm against the idea of building a road here.
  Buraya yol yapılması fikrine karşıyım.

Competing with someone in a game, a race or a fight.

• We're playing against the best team in the league on Saturday.
  Cumartesi ligin en iyi takımına karşı oynuyoruz.
• She will race against three other swimmers in the final.
  Finalde diğer üç yüzücüyle karşı karşıya gelecek.

Touching or pressing on something, especially for support.

• He leaned against the wall and closed his eyes.
  Duvara yaslandı ve gözlerini kapadı.
• There was a ladder against the side of the house.
  Evin yan duvarına dayalı bir merdiven vardı.

Hitting something or moving into contact with it.

• The rain was beating against the windows all night.
  Yağmur bütün gece pencerelere vurdu durdu.
• The waves crashed against the rocks.
  Dalgalar kayalara çarparak kırıldı.

Not allowed by a rule or law, or not following someone's wishes or advice.

• It's against the law to drive without a licence.
  Ehliyetsiz araba kullanmak yasaya aykırıdır.
• The boy was made to sign the paper against his will.
  Çocuğa kâğıt isteği dışında imzalatıldı.

In the opposite direction to the movement of something.

• It's hard to cycle against the wind.
  Rüzgâra karşı bisiklet sürmek zordur.
• The fish were swimming against the current.
  Balıklar akıntıya karşı yüzüyordu.

In order to protect someone or something from a danger or a problem.

• Have you been vaccinated against flu this year?
  Bu yıl gribe karşı aşı oldun mu?
• Our house is insured against fire and flood.
  Evimiz yangına ve sele karşı sigortalı.

With something behind as a background.

• The trees looked black against the evening sky.
  Ağaçlar akşam göğünün fonunda simsiyah görünüyordu.
• In the photo she is standing against a white wall.
  Fotoğrafta beyaz bir duvarın önünde duruyor.

Compared with something, or measured in relation to it.

• The lira fell against the dollar this week.
  Lira bu hafta dolar karşısında değer kaybetti.
• You have to weigh the benefits against the costs.
  Faydaları maliyetlere kıyasla tartman gerekiyor.

Making something more difficult or less likely for someone.

• His lack of experience was against him in the interview.
  Mülakatta deneyimsizliği onun aleyhine oldu.
• Time is against us, so we must hurry.
  Zaman bizim aleyhimize işliyor, acele etmeliyiz.