Like water to a fish, this thing is not entirely imperceptible but it is rarely noted, if at all.
Learn English – Word for something so familiar or ubiquitous that it goes unnoticed
phrase-requestssingle-word-requests
phrase-requestssingle-word-requests
Like water to a fish, this thing is not entirely imperceptible but it is rarely noted, if at all.
Best Answer
simile or metaphor might work best. "just part of the scenery", "as familiar as the furniture". Or you could say that something "disappeared into the background".