A. delay
B. risk
C. monitor
D. deny

Explanation:

The word accelerate means to increase speed or make something happen faster.

In simple words: to move or act quickly / speed up something.

The opposite of accelerate is delay, which means to slow down, postpone, or make something happen later.

So, Delay is the correct antonym of Accelerate.

Real-Life Example

Imagine you are going to school:

• If the driver increases the speed of the bus → this is accelerating.
• If the bus stops or moves slowly and reaches late → this is delaying.

Speed up = Accelerate
Slow down = Delay

Main Points for Exams

• Accelerate means to increase speed or make faster.
• It is often used in driving, physics, and daily life.
• Delay means to slow down or make late.
• Other options are unrelated to speed.
• Therefore, Delay is the correct antonym of Accelerate.
• This type of question is common in PPSC, FPSC, CSS, PMS, NTS, IELTS, TOEFL, and other competitive exams.

Quick Memory Trick

🚀 Accelerate = Go Fast
🐢 Delay = Go Slow / Late

Fast ↔ Slow
Accelerate ↔ Delay ✔️