IPA: //ˈmæn.ju.əli//
KK: /ˈmæn.ju.ə.li/
In a way that involves using one's hands rather than a machine or automatic process.
The technician fixed the device manually instead of using automated tools.
Manually → It is formed from "manus" (meaning hand) and the suffix "-ally" (meaning in a manner relating to). The word "manually" means in a manner that involves the use of hands or physical effort.
Think of using your 'hands' ('manus') to do something 'in a manner' ('-ally') — that's why manually means doing something by hand.