Accuse, acknowledge, acquaint,
To accuse is to charge or lodge a complaint against someone.
- She accused me of poisoning her dog.
- The public prosecutor accused the defendant of murder.
- You can’t accuse me of dishonesty.
- His accusation that I took the money is baseless.
If something is an accustomed practice, it is common, normal, regular, habitual or customary.
- Painting barns red is an accustomed practice.
If you are accustomed to something, you are used to it.
- Eskimos are accustomed to cold weather.
- I am not accustomed to living alone.
- He is accustomed to working at night.
Note that after accustomed to we need a noun or an –ing form.
To achieve is to accomplish, reach, or fulfill.
- We have achieved our goal of collecting ten million dollars.
- If you don’t have access to electricity, there is a limit to what you can achieve.
Achieve can also mean attain, gain or acquire.
- Can mere mortal beings achieve perfect happiness?
An achievement is an accomplishment, attainment or fulfillment.
- Moon landing was a stunning technological achievement.
- Singing is just one of her accomplishments.
To acknowledge is to accept, recognize, admit or allow.
- They acknowledged their defeat.
- Our constitution acknowledges that everyone is equal before the law.
- He acknowledged her contribution to their business.
Acknowledgement means recognition, credit or recognizance.
- He gave his colleagues full acknowledgment for their help in launching the business.
- His acknowledgment that he took the money cleared his brother of blame.
To acquaint with someone is to meet them.
- Have you just met her or were you acquainted before?
- My grandfather believes in getting acquainted with everyone in the neighborhood.
To acquaint someone with something is to familiarize them with it.
- It took me several months to acquaint myself with the new job.
An acquaintance is a distant friend or someone slightly known to you.
- She is just an acquaintance. I have met only a couple of times.