To bend; turn from a direct line.

使曲折；使弯曲。

To vary the sound of, as the voice, by producing changes in pitch or tone.

改变音调。

To vary the form of (a noun, verb, or adjective) so as to show changes in the person, number, case, etc.

【文法】变化字形。

To undergo grammatical change of ending.

发生字尾变化。