To be honest, I have little understanding of any word that isn't a thing or an action. I know which phrases to use when, through long experience, but it leads to some huge problems when asked to comment on theology,for example, as people may see from other threads I'm on. Or on emotions and relationships.
If you take the sentence "I have no understanding of any word that isn't a thing", I have to convert all of it to images.
"I" is easy. That's me. I know what I look like from picture and the mirror.
"have" is sort of easy because I can imagine me holding something.
"no understanding" is me guessing that this is the right thing to say here, because I don't know what an understanding looks like or acts like, so there's no picture of it in my mind. I can imagine a person being puzzled, perhaps.
"of any word" Well, I know what a word looks like. 'Of' and 'Any' aren't words that make sense to my brain.
"that isn't a thing" I know what 'things' look like, so that helps. 'That' and 'isn't' and 'a' are all irrelevant to me.
So over 40+ years I've learned thousands and thousands of phrases and ways to link words I can 'see' to words people expect to be there.