inflection

noun

1.
a change in the form of a word (usually by adding a suffix) to indicate a change in its grammatical function
byedness inflexion
Derived from:
inflect inflectional
2.
the patterns of stress and intonation in a language
prosody
Derived from:
inflect
3.
deviation from a straight or normal course
flection flexion
4.
a manner of speaking in which the loudness or pitch or tone of the voice is modified
modulation
Derived from:
inflect