Final answer:
The suffix meaning control or stopping is -stasis.
Step-by-step explanation:
An example of this is the word hemostasis, which refers to the stopping of bleeding. Suffixes play a significant role in the meaning and spelling of words.
Regarding spelling rules, in words where a [k] follows a consonant and is followed by le at the end, the [k] is typically spelled with a c, such as in the word tackle. However, in some cases where a word ends in c and a suffix beginning with e, i, or y is added, a k is inserted to maintain the hard [k] sound, for example, panic plus ed becomes panicked.
The sound [s] is often spelled at the end of words. For example, words like class, stress, and dress all have the ss spelling to represent the sound [s]. In the case of the word upsetting, the suffix is -ing, and the stem is upset. You do twin the final consonant when adding a suffix like -ing if the stem ends in CVC (consonant-vowel-consonant), which is why we write upset as upsetting.