What beginning with the letter A is the meaning of the prefix 'circum'?
Prefix is a part of the word in the front part that when used may give a word opposite meaning or different meaning. A prefix is an affix which is placed before the stem of a word. Adding it to the beginning of one word changes it into another word. For example, when the prefix un- is added to the word happy, it creates the word unhappy.
Am- is not a prefix in its own right. It may form a part of another prefix (such as amphi- in 'amphitheatre' or ambi- in 'ambivalent', both meaning 'both'). It may include the prefix plus the beginning of the root, as in 'amorphous' (a- meaning 'without' and morphe meaning 'form'). In words like 'amatory' and 'ambulance', there is no prefix; the root just happens to start with am (respectively, amator meaning 'lover' and ambulans meaning…