Inflect (verb)

1. To change the form of a word to indicate its grammatical function or tense.
2. To vary the pitch or tone of one's voice for emphasis or expression.
3. To change the shape or direction of something.

Origin:

From latin inflectere (to bend, turn, change), from in- (in, on) + flectere (to bend).

Examples:

1. The verb "to be" is inflected for number, person, and tense.
2. He inflected his voice to indicate a question.
3. The river inflects to the left.
4. The road inflected to the right.
5. He inflected the last word of the sentence for emphasis.