Sometimes it doesn’t matter. If I had a whole page describing this man, I’ll most likely get the gist. I’m just not the type to look up every word I come across.
Your example falls under “I don’t understand the message.” There are no context clues and the sentence relies on that one word for it to make any sense to me so it’s something I would actually look up.
40, I want to go back to when my body was in great condition. At 20, I didn’t feel any of the aches and pains I had in my early 30s. It would give me 10 years to do a better job taking care of it and hopefully avoid the current state it’s in now.