The word "aroma" has a considerably more positive meaning than the word "smell" or a more unfavourable word like "stench," which tends to convey a pleasant smell. One can assume that Grandma is preparing something delectable (rather than repulsive)
In addition to a word's dictionary definition, connotation relates to the feelings it arouses. In the end, the word conveys a connotation other than what it literally means. The connotation of a word can change how something is understood when it is spoken or written, whether in writing or in speech.
A word's negative connotation is the unfavourable sentiment or emotion attached to it. The positive connotation of a word is the pleasant feeling or emotion it connotes. When a word does not evoke either good or negative emotions, it has a neutral connotation.
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