IPA: /ˈsteɪnləsli/
KK: /ˈsteɪnləsli/
In a way that is free from stains or blemishes; showing purity or cleanliness.
The silverware gleamed stainlessly after being polished.
Stainlessly → It is formed from "stainless" (from Old English "stænleas", meaning without stain) and the suffix "-ly" (meaning in a manner). The word "stainlessly" means in a manner that is without stain or blemish.
Think of something that is 'without stain' ('stainless') and how it is done 'in a manner' ('-ly'). This helps you remember that 'stainlessly' means to do something in a pure or unblemished way.