It’s a lot harder to do this if you read aloud. Even if you’re just moving your lips without making any sound, if you don’t want to be heard reading random sentences aloud. I have found this the best way to determine whether I know the reading of a word or not.
I’d say that’s the way japanese beginners like me get by… for instance today I noticed the sign 飲食禁止 entering a temple and, while I see now I didn’t get the right reading, I could understand it.
On the other side, there are words that are very difficult to remember looking only at kanji. One notable example is ぜんぜん (not at all - very basic word), which is pretty difficult to associate to the kanji 全然.
Finally you have to consider that when reading texts for kids/adolescent like manga, many times they won’t use kanji but kana… another reason to learn the reading
Indeed it does. lol I was thinking of another word from the same story.
That because is a Chinese-rooted word:
全: all; whole; entire; every; complete
然: adverbial suffix; -ly
- completely; entirely; utterly
Hence, “entirely” in an affirmative sentence, “not at all” in a negative one.