system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come after a while of reading or repeating the same word over and over, it no longer begins to sound/look right?
gpt
Your brain tends to try to ignore repeated stimulus. Consider when you walk into a room with a smell, after a short time of that smell not changing, you have to really think to notice it.

The same thing works with language. When you say a word, a network in your brain gets stimulated and it makes you think a bit about your associations with the word. When you say it again and again, your brain stops caring about that stimulation and so it doesn't trigger the associations as strongly. Very quickly, the sense of the word's meaning stops activating and it sounds strange and alien.