Inflection (noun)

1. The change in the form of a word to indicate grammatical function, such as tense, mood, person, number, gender, or case.
2. The change in pitch, stress, or loudness in speech.

Origin:

The word "inflection" comes from the latin word "inflectere" meaning "to bend or turn.".

Examples:

1. In English, the inflection of the verb "to be" changes to indicate tense: "I am", "he is", "they were".
2. In Spanish, nouns have inflections to indicate gender and number: "el gato" (the cat (masculine)), "la gata" (the cat (feminine)).
3. He spoke with a distinct inflection in his voice.
4. The inflection in her speech indicated that she was angry.
5. The inflection of the words changed the meaning of the sentence.