Trying to Learn a bit of Dutch

bicycle sign from the Netherlands
I’ve been trying to improve on what little Dutch I know, mainly adding to my vocabulary. And I’ve discovered something baffling. Words that have an interesting sound are more likely to be retained. For instance, the word “fietsen” which means to bicycle. Now I don’t plan to bicycle in the rain forest. Or even in the city of Paramaribo, for that matter! And I’m sure I won’t find anything in the old Dutch records of 1699-1701 about bicycling, either. Yet that word clings to my brain while more useful words just slide right off. What’s up with that?