IPA: /ˈfɜːrstlɪŋ/
KK: /ˈfɜrstlɪŋ/
A first-born child or animal, especially the first offspring of a parent.
The farmer was excited to see the firstling of his prize sheep.
Firstling → It is formed from "first" (from Old English "fyrst", meaning the initial or earliest) and "-ling" (a diminutive suffix in Old English, often indicating a young one or offspring). The word "firstling" refers to the firstborn offspring or the earliest of a kind.
Think of the word 'first' to remember that a 'firstling' is the very first offspring or the initial one born.