The terms ac, al, ary, and ic are all adjective suffixes meaning "pertaining to."
<u>Explanation:</u>
The terms ac, al, ary, and ic are adjective suffixes. this means that "pertaining to". For instance let us take some words like, Cardiac, cephalic, congenital, integumentary,etc. the meaning of these words are pertaining to heart,head,presence of birth,skin respectively.
Here, the terms ac,al,ary,ic all refers to pertaining to. The term pertaining to refers to the meaning that it belongs to or related to something. It also refers to the meaning of applicable or appropriate or relevant.