A good suffix could be..."nition"
Or maybe,"cit"
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Answer:
The little girls were playing safely near the empty street.
The large gorilla ran swiftly through the thick forest.
The excited man drove fast to his new work.
The hopeful woman continuously prayed for her sick son.
The professional musicians practiced restlessly.
Explanation: thank tinkerbell25
To “clarify”. I hope that’s the word you’re looking for.