IPA: /ˈbræŋkiəl/
KK: /ˈbræŋkiəl/
Relating to the gills of fish or similar structures in other animals.
The branchial arches are important for the development of the respiratory system in fish.
Branchial → It is formed from "branchia" (from Greek "branchia", meaning gills) and the suffix "-al" (meaning pertaining to). The word "branchial" refers to something that pertains to gills, typically in aquatic animals.
Think of 'branchia' which means gills, and remember that 'branchial' refers to anything related to gills.