inflect

To cause to curve inwards.

To change the tone or pitch of the voice when speaking or singing.

The actress has a great skill of being able to inflect her voice to any situation.

To vary the form of a word to express tense, gender, number, mood, etc.

To be varied in the form to express tense, gender, number, mood, etc.

In Latin, adjectives and nouns inflect a lot, but inflection is minimally found in Modern English.