IPA: //ˈbrækiˌeɪʃən//
KK: /ˈbrækieɪʃən/
The act of moving by swinging the arms from one hold to another, often seen in some primates and in certain types of physical exercise.
The monkey used brachiation to move swiftly between the branches of the tree.
Brachiation → It is formed from "brachium" (meaning arm) and the suffix "-ation" (indicating a process or action). The word describes the process of moving by swinging from one arm to another, as seen in some primates.
Think of 'arms' ('brachium') swinging in a 'process' ('-ation') — that's how brachiation describes the movement of swinging from arm to arm.