English prefix ac
The ac is a prefix in a set of prefixs with the same rule, the letter a plus a consonant which is the first letter of a root, other examples: ab-,ac-,ad-,af-,ag-,an-,ap-,ar-,as-,at.
One of the meanings of the prefix is specify the direction of the root, for example: to, near, toward.
accord: ac(to) + cord(heart)
Accord means agreement, be in harmony, reconcile , be of one mind or consistent between two or multiple entities.
The accord or conflict between countries determine peace or war.
The heart follow, comply, according to an agreement, common rules, a treaty, so everyone can lives in harmony. This should be how it make sense.
acclaim:ac(to) + claim(cry, shout)
Shout to someone may be positive or negative, but in acclaim, it's postive, you shout to some because you love or enthusiastic about him or her. The fans acclaim to the performer in a rock band live.
The root cess means go, so the combination literally means "go to". If you access a website, you go to that website by opening it in your browser.
accept: to take
The cept means take, catch, seize, the object usually mentally, but can also be physically. The point is you take something and then like it, admit it, recognize it, agree with it, embrace it, there are some willingnesses here, you can also see this characteristic in both the access and acclaim.