Inflections in language refer to what aspect?

Inflections in language refer to the modifications made to words to convey different grammatical categories such as tense, mood, voice, aspect, person, number, gender, and case. This means that inflections change the form of a word to express these grammatical features. For example, adding -ed to a verb to indicate past tense (e.g., "walk" becomes "walked") is an instance of inflection.

When looking at the aspect of stress and intonation patterns, while it is important in spoken language and contributes to meaning and emotion, it does not pertain to the grammatical alterations that define inflections. Therefore, while stress and intonation do play a role in language, they are separate from the concept of inflection, which focuses more on the grammatical modifications to words rather than their pronunciation patterns.