noun
manner
MAN-er/ˈmænər/
The characteristic way in which something is done.
The adult pours in a gentle manner first, then carelessly spills the water.

Etymology
The hand connection survives in the original idea of a “method of handling.” This broadened into a way of doing something, including someone’s characteristic behavior or speech.
In context
release yourself from a long talk but do so in a courteous manner expressing regret for the necessity
More examples
- Please store the samples in the manner shown here.
- His friendly manner puts new neighbors at ease.
- The two machines operate in a similar manner.
Forms
manner · manners
mannerism noun — A distinctive habit of behavior or speech.