Final answer:
The pattern followed by the given words is that they are suffixes added to change the meaning or function of a root word. Suffixes like '-ion' and '-ure' can cause the [ch] sound to be spelled with a due to palatalization, and some prefixes assimilate to the stem's starting sound.
Step-by-step explanation:
The pattern followed by the given words 'al, tic, ic, iac, ious, ous, ent' is that they are all suffixes added to a root word to change its meaning or function in a sentence. These suffixes do not represent prefixes, a change in the root word itself, or a rearrangement of the root word's letters. In the case of the suffix '-ion,' for example, when added to the base 'digest,' it becomes 'digestion' with the [ch] spelled as due to the phonetic process called palatalization, and the stressed vowel is the one preceding this [ch]. Similarly, the suffix '-ure' when added to 'script' results in 'scripture,' with the [ch] spelled as once again due to palatalization.
Another aspect to consider is how certain prefixes can assimilate to the stem to which they are added. For instance, when the prefixes ad-, com-, and in- are added to stems starting with an , they transform to ar-, cor-, and ir- due to assimilation, which is a phonetic adjustment of sounds within words. When dealing with the spelling of the long vowel [ē], as in the word 'galleries,' the 'i' in the suffix 'ies' represents this sound.