"inflection" in the noun sense
1. inflection, inflexion
a change in the form of a word (usually by adding a suffix) to indicate a change in its grammatical function
2. prosody, inflection
the patterns of stress and intonation in a language
3. inflection, flection, flexion
deviation from a straight or normal course
4. modulation, inflection
a manner of speaking in which the loudness or pitch or tone of the voice is modified
Source: WordNet® (An amazing lexical database of English)
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