nevermind
interj.used to tell someone that what you just said is not important. You use it when you want to stop talking about a topic or when you change your mind.
interj.used to dismiss a previous statement as unimportant or to signal that the listener should disregard a request. Often functions as a conversational filler to smooth over a misunderstanding.
“I forgot what I was going to say, so nevermind.”
“I thought I lost my keys, but I just found them in my pocket, so nevermind.”
“If the instructions seem too complicated for the initial setup, then nevermind; we can simply proceed with the default settings and adjust them later.”
Commonly written as two words ('never mind') in formal contexts, though the single-word spelling is frequent in informal digital communication.
When used to mean 'don't worry about', the phrase does not require the preposition 'about'.
From never + mind (in never mind).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.